Add Dungeon Room and Object Selection Features

- Introduced new classes for DungeonRoomSelector and DungeonObjectSelector to enhance room and object management within the dungeon editor.
- Implemented UI components for selecting rooms and entrances, allowing users to easily navigate and manage dungeon layouts.
- Added functionality for rendering room graphics and object previews, improving the visual editing experience.
- Updated the DungeonEditor class to integrate the new selectors, streamlining the overall editing workflow.
- Enhanced error handling and validation in room and object management processes to ensure robust functionality.

src/app/editor/dungeon/dungeon_object_selector.h

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+#ifndef YAZE_APP_EDITOR_DUNGEON_DUNGEON_OBJECT_SELECTOR_H
+#define YAZE_APP_EDITOR_DUNGEON_DUNGEON_OBJECT_SELECTOR_H
+
+#include "app/gui/canvas.h"
+#include "app/rom.h"
+#include "app/zelda3/dungeon/object_renderer.h"
+#include "app/zelda3/dungeon/dungeon_object_editor.h"
+#include "app/zelda3/dungeon/dungeon_editor_system.h"
+#include "app/gfx/snes_palette.h"
+#include "imgui/imgui.h"
+
+namespace yaze {
+namespace editor {
+
+/**
+ * @brief Handles object selection, preview, and editing UI
+ */
+class DungeonObjectSelector {
+ public:
+  explicit DungeonObjectSelector(Rom* rom = nullptr) : rom_(rom), object_renderer_(rom) {}
+
+  void DrawTileSelector();
+  void DrawObjectRenderer();
+  void DrawIntegratedEditingPanels();
+  
+  void set_rom(Rom* rom) { 
+    rom_ = rom; 
+    object_renderer_.SetROM(rom);
+  }
+  Rom* rom() const { return rom_; }
+
+  // Editor system access
+  void set_dungeon_editor_system(std::unique_ptr<zelda3::DungeonEditorSystem>* system) { 
+    dungeon_editor_system_ = system; 
+  }
+  void set_object_editor(std::shared_ptr<zelda3::DungeonObjectEditor>* editor) { 
+    object_editor_ = editor; 
+  }
+
+  // Room data access
+  void set_rooms(std::array<zelda3::Room, 0x128>* rooms) { rooms_ = rooms; }
+  void set_current_room_id(int room_id) { current_room_id_ = room_id; }
+
+  // Palette access
+  void set_current_palette_group_id(uint64_t id) { current_palette_group_id_ = id; }
+
+ private:
+  void DrawRoomGraphics();
+  void DrawCompactObjectEditor();
+  void DrawCompactSpriteEditor();
+  void DrawCompactItemEditor();
+  void DrawCompactEntranceEditor();
+  void DrawCompactDoorEditor();
+  void DrawCompactChestEditor();
+  void DrawCompactPropertiesEditor();
+
+  Rom* rom_ = nullptr;
+  gui::Canvas room_gfx_canvas_{"##RoomGfxCanvas", ImVec2(0x100 + 1, 0x10 * 0x40 + 1)};
+  gui::Canvas object_canvas_;
+  zelda3::ObjectRenderer object_renderer_;
+  
+  // Editor systems
+  std::unique_ptr<zelda3::DungeonEditorSystem>* dungeon_editor_system_ = nullptr;
+  std::shared_ptr<zelda3::DungeonObjectEditor>* object_editor_ = nullptr;
+  
+  // Room data
+  std::array<zelda3::Room, 0x128>* rooms_ = nullptr;
+  int current_room_id_ = 0;
+  
+  // Palette data
+  uint64_t current_palette_group_id_ = 0;
+  
+  // Object preview system
+  zelda3::RoomObject preview_object_{0, 0, 0, 0, 0};
+  gfx::SnesPalette preview_palette_;
+  bool object_loaded_ = false;
+};
+
+}  // namespace editor
+}  // namespace yaze
+
+#endif