Add theme management and background rendering features

- Introduced a comprehensive theme management system, allowing users to load, save, and switch between multiple themes.
- Added support for various built-in themes, enhancing the visual customization of the application.
- Implemented a background renderer for improved visual effects in docking windows, including grid backgrounds and subtle animations.
- Enhanced the EditorManager UI with themed elements, providing a more cohesive and engaging user experience.
- Updated CMake configuration to include new theme and background renderer source files, ensuring proper integration into the build system.

assets/themes/cyberpunk.theme

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+# Cyberpunk Theme
+# Neon-inspired futuristic theme
+name=Cyberpunk
+description=Neon-inspired futuristic theme
+author=YAZE Team
+version=1.0
+
+[colors]
+# Primary colors (neon cyberpunk)
+primary=255,20,147,255
+secondary=0,255,255,255
+accent=255,0,128,255
+background=10,10,20,255
+surface=20,20,40,255
+
+# Status colors
+error=255,50,100,255
+warning=255,255,0,255
+success=0,255,100,255
+info=100,200,255,255
+
+# Text colors
+text_primary=255,255,255,255
+text_secondary=200,200,255,255
+text_disabled=100,100,150,255
+
+# Window colors
+window_bg=15,15,30,240
+child_bg=10,10,25,200
+popup_bg=20,20,40,250
+
+# Interactive elements
+button=40,20,60,255
+button_hovered=120,20,120,255
+button_active=160,40,160,255
+frame_bg=30,30,50,255
+frame_bg_hovered=40,40,70,255
+frame_bg_active=60,20,80,255
+
+# Navigation
+header=30,10,50,255
+header_hovered=80,20,100,255
+header_active=120,40,140,255
+tab=25,15,45,255
+tab_hovered=60,30,80,255
+tab_active=100,20,120,255
+menu_bar_bg=20,10,40,255
+title_bg=25,15,45,255
+title_bg_active=30,10,50,255
+title_bg_collapsed=25,15,45,255
+
+[style]
+window_rounding=10.0
+frame_rounding=8.0
+scrollbar_rounding=10.0
+grab_rounding=6.0
+tab_rounding=6.0
+window_border_size=1.0
+frame_border_size=1.0
+enable_animations=true
+enable_glow_effects=true
+animation_speed=1.5

assets/themes/forest.theme

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+# Forest Theme
+# Enhanced forest theme with better readability
+name=Forest
+description=Deep forest theme with enhanced readability
+author=YAZE Team
+version=1.0
+
+[colors]
+# Primary colors (enhanced forest with better contrast)
+primary=100,180,120,255         # Brighter forest green
+secondary=70,130,85,255         # Mid forest green
+accent=130,220,150,255          # Light accent green
+background=15,25,15,255         # Darker background for contrast
+surface=25,35,25,255
+
+# Status colors
+error=255,120,120,255
+warning=255,220,120,255
+success=100,180,120,255
+info=120,200,180,255
+
+# Text colors (enhanced for readability)
+text_primary=250,255,250,255    # Very light for contrast
+text_secondary=220,240,220,255  # Light green tint
+text_disabled=150,170,150,255   # Brighter disabled text
+
+# Window colors (better contrast)
+window_bg=20,30,20,240
+child_bg=15,25,15,200
+popup_bg=25,35,25,250
+
+# Interactive elements (better visibility)
+button=70,110,80,255
+button_hovered=100,150,115,255
+button_active=130,180,145,255
+frame_bg=40,60,45,200
+frame_bg_hovered=55,80,60,220
+frame_bg_active=70,110,80,240
+
+# Navigation (better contrast)
+header=55,85,60,255
+header_hovered=100,150,115,255
+header_active=130,180,145,255
+tab=45,75,50,255
+tab_hovered=70,110,80,255
+tab_active=100,150,115,255
+menu_bar_bg=40,70,45,255
+title_bg=50,80,55,255
+title_bg_active=55,85,60,255
+title_bg_collapsed=45,75,50,255
+
+# Separators (better visibility)
+separator=120,160,130,180
+separator_hovered=150,200,160,220
+separator_active=180,240,190,255
+
+# Scrollbars (better visibility)
+scrollbar_bg=40,60,45,180
+scrollbar_grab=80,120,90,200
+scrollbar_grab_hovered=100,150,115,230
+scrollbar_grab_active=130,180,145,255
+
+[style]
+window_rounding=6.0
+frame_rounding=4.0
+scrollbar_rounding=6.0
+grab_rounding=3.0
+tab_rounding=3.0
+window_border_size=0.0
+frame_border_size=0.0
+enable_animations=true
+enable_glow_effects=false
+animation_speed=1.0

assets/themes/midnight.theme

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+# Midnight Theme
+# Enhanced midnight theme with better readability
+name=Midnight
+description=Deep blue midnight theme with enhanced readability
+author=YAZE Team
+version=1.0
+
+[colors]
+# Primary colors (enhanced midnight with better contrast)
+primary=100,160,230,255         # Brighter blue
+secondary=70,120,180,255        # Mid blue
+accent=140,200,255,255          # Light blue accent
+background=10,15,25,255         # Darker background for contrast
+surface=20,25,35,255
+
+# Status colors
+error=255,120,120,255
+warning=255,220,120,255
+success=120,255,180,255
+info=140,200,255,255
+
+# Text colors (enhanced for readability)
+text_primary=245,250,255,255    # Very light blue-white
+text_secondary=200,220,240,255  # Light blue tint
+text_disabled=140,160,180,255   # Brighter disabled text
+
+# Window colors (better contrast)
+window_bg=15,20,30,240
+child_bg=10,15,25,200
+popup_bg=20,25,35,250
+
+# Interactive elements (better visibility)
+button=50,80,120,255
+button_hovered=80,120,160,255
+button_active=110,150,190,255
+frame_bg=30,45,65,200
+frame_bg_hovered=40,60,85,220
+frame_bg_active=60,90,130,240
+
+# Navigation (better contrast)
+header=40,65,100,255
+header_hovered=70,110,150,255
+header_active=100,140,180,255
+tab=30,55,90,255
+tab_hovered=50,80,120,255
+tab_active=70,110,150,255
+menu_bar_bg=25,50,85,255
+title_bg=35,60,95,255
+title_bg_active=40,65,100,255
+title_bg_collapsed=30,55,90,255
+
+# Separators (better visibility)
+separator=100,140,180,180
+separator_hovered=130,170,210,220
+separator_active=160,200,240,255
+
+# Scrollbars (better visibility)
+scrollbar_bg=30,45,65,180
+scrollbar_grab=70,110,150,200
+scrollbar_grab_hovered=100,140,180,230
+scrollbar_grab_active=130,170,210,255
+
+[style]
+window_rounding=8.0
+frame_rounding=6.0
+scrollbar_rounding=8.0
+grab_rounding=4.0
+tab_rounding=6.0
+window_border_size=0.0
+frame_border_size=0.0
+enable_animations=true
+enable_glow_effects=true
+animation_speed=1.2

assets/themes/sunset.theme

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+# Sunset Theme
+# Warm orange and purple sunset theme
+name=Sunset
+description=Warm orange and purple sunset theme
+author=YAZE Team
+version=1.0
+
+[colors]
+# Primary colors (sunset)
+primary=255,140,60,255
+secondary=200,100,150,255
+accent=255,180,100,255
+background=30,20,35,255
+surface=40,30,45,255
+
+# Status colors
+error=255,100,120,255
+warning=255,200,100,255
+success=150,255,150,255
+info=150,200,255,255
+
+# Text colors
+text_primary=255,245,235,255
+text_secondary=220,200,180,255
+text_disabled=150,130,120,255
+
+# Window colors
+window_bg=35,25,40,240
+child_bg=30,20,35,200
+popup_bg=40,30,45,250
+
+# Interactive elements
+button=60,40,70,255
+button_hovered=120,80,100,255
+button_active=150,100,120,255
+frame_bg=45,35,50,255
+frame_bg_hovered=55,45,60,255
+frame_bg_active=80,60,90,255
+
+# Navigation
+header=50,35,60,255
+header_hovered=100,70,90,255
+header_active=130,90,110,255
+tab=40,30,50,255
+tab_hovered=70,50,70,255
+tab_active=100,70,90,255
+menu_bar_bg=35,25,45,255
+title_bg=40,30,50,255
+title_bg_active=50,35,60,255
+title_bg_collapsed=40,30,50,255
+
+[style]
+window_rounding=12.0
+frame_rounding=8.0
+scrollbar_rounding=12.0
+grab_rounding=6.0
+tab_rounding=8.0
+window_border_size=0.0
+frame_border_size=0.0
+enable_animations=true
+enable_glow_effects=false
+animation_speed=1.0

assets/themes/yaze_tre.theme

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+# YAZE Tre Theme
+# Theme resource edition based on original ColorsYaze() function
+name=YAZE Tre
+description=YAZE theme resource edition (file-based)
+author=YAZE Team
+version=1.0
+
+[colors]
+# Primary colors (exact ALTTP colors from original code)
+primary=92,115,92,255           # 0.36f, 0.45f, 0.36f - allttpLightGreen
+secondary=71,92,71,255          # 0.28f, 0.36f, 0.28f - alttpMidGreen
+accent=89,119,89,255            # 0.347f, 0.466f, 0.347f - TabActive exact
+background=8,8,8,255            # Very dark gray for better grid visibility
+surface=12,12,12,255            # Slightly lighter dark gray surface
+
+# Status colors
+error=220,50,47,255
+warning=255,193,7,255
+success=92,115,92,255
+info=52,152,219,255
+
+# Text colors (exact from original)
+text_primary=230,230,230,255    # 0.90f, 0.90f, 0.90f
+text_secondary=180,180,180,255
+text_disabled=153,153,153,255   # 0.60f, 0.60f, 0.60f
+
+# Window colors (exact from original)
+window_bg=8,8,8,217             # Very dark gray with same alpha
+child_bg=0,0,0,0                # 0.00f, 0.00f, 0.00f, 0.00f - transparent
+popup_bg=28,28,36,235           # 0.11f, 0.11f, 0.14f, 0.92f
+
+# Interactive elements (exact from original)
+button=71,92,71,255             # alttpMidGreen
+button_hovered=125,145,125,255  # allttpLightestGreen (exact)
+button_active=92,115,92,255     # allttpLightGreen
+frame_bg=110,110,110,99         # 0.43f, 0.43f, 0.43f, 0.39f
+frame_bg_hovered=71,92,71,102   # 0.28f, 0.36f, 0.28f, 0.40f
+frame_bg_active=71,92,71,176    # 0.28f, 0.36f, 0.28f, 0.69f
+
+# Navigation (exact from original)
+header=46,66,46,255             # alttpDarkGreen
+header_hovered=92,115,92,255    # allttpLightGreen
+header_active=71,92,71,255      # alttpMidGreen
+tab=46,66,46,255                # alttpDarkGreen
+tab_hovered=71,92,71,255        # alttpMidGreen
+tab_active=89,119,89,255        # TabActive exact color
+menu_bar_bg=46,66,46,255        # alttpDarkGreen
+title_bg=71,92,71,255           # alttpMidGreen
+title_bg_active=46,66,46,255    # alttpDarkGreen
+title_bg_collapsed=71,92,71,255 # alttpMidGreen
+
+# Borders and separators (exact from original)
+border=92,115,92,255            # allttpLightGreen
+border_shadow=0,0,0,0           # No shadow in original
+separator=127,127,127,153       # 0.50f, 0.50f, 0.50f, 0.60f
+separator_hovered=153,153,178,255 # 0.60f, 0.60f, 0.70f
+separator_active=178,178,230,255  # 0.70f, 0.70f, 0.90f
+
+# Scrollbars (exact from original)
+scrollbar_bg=92,115,92,153      # 0.36f, 0.45f, 0.36f, 0.60f
+scrollbar_grab=92,115,92,76     # 0.36f, 0.45f, 0.36f, 0.30f (exact)
+scrollbar_grab_hovered=92,115,92,102 # 0.36f, 0.45f, 0.36f, 0.40f
+scrollbar_grab_active=92,115,92,153  # 0.36f, 0.45f, 0.36f, 0.60f
+
+# Resize grips (exact from original - these are light blue, not white!)
+resize_grip=255,255,255,26      # 1.00f, 1.00f, 1.00f, 0.10f
+resize_grip_hovered=199,209,255,153 # 0.78f, 0.82f, 1.00f, 0.60f (light blue!)
+resize_grip_active=199,209,255,230  # 0.78f, 0.82f, 1.00f, 0.90f (light blue!)
+
+# Additional controls (missing from theme)
+check_mark=230,230,230,128      # 0.90f, 0.90f, 0.90f, 0.50f
+slider_grab=255,255,255,77      # 1.00f, 1.00f, 1.00f, 0.30f  
+slider_grab_active=92,115,92,153 # 0.36f, 0.45f, 0.36f, 0.60f
+
+# Table colors (from original)
+table_header_bg=46,66,46,255    # alttpDarkGreen
+table_border_strong=71,92,71,255 # alttpMidGreen
+table_border_light=66,66,71,255 # 0.26f, 0.26f, 0.28f
+table_row_bg=0,0,0,0            # Transparent
+table_row_bg_alt=255,255,255,18 # 1.00f, 1.00f, 1.00f, 0.07f
+
+[style]
+window_rounding=0.0
+frame_rounding=5.0
+scrollbar_rounding=5.0
+grab_rounding=3.0
+tab_rounding=0.0
+window_border_size=0.0
+frame_border_size=0.0
+enable_animations=true
+enable_glow_effects=false
+animation_speed=1.0