feat: Enhance emulator UI and performance features

- Added new UI components for the emulator, including dedicated panels for CPU and APU debugging, improving user interaction and debugging capabilities.
- Implemented a caching mechanism for rendered objects in the DungeonCanvasViewer to optimize performance and reduce rendering time.
- Updated the CMake configuration to include new UI source files, ensuring proper organization and build management.
- Enhanced the theme manager with improved color definitions for better visibility and consistency across the UI.
- Refactored the emulator interface to delegate rendering tasks to the UI layer, streamlining the codebase and improving maintainability.

src/app/editor/message/message_editor.cc

@@ -336,7 +336,7 @@ void MessageEditor::DrawMessagePreview() {
   } else {
     // Create bitmap and queue texture creation
     current_font_gfx16_bitmap_.Create(kCurrentMessageWidth, kCurrentMessageHeight, 
-                                     172, message_preview_.current_preview_data_);
+                                     64, message_preview_.current_preview_data_);
     current_font_gfx16_bitmap_.SetPalette(font_preview_colors_);
     gfx::Arena::Get().QueueTextureCommand(
         gfx::Arena::TextureCommandType::CREATE, &current_font_gfx16_bitmap_);