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_editor.h

@@ -14,6 +14,9 @@
 #include "zelda3/dungeon/room.h"
 #include "zelda3/dungeon/room_entrance.h"
 #include "zelda3/dungeon/room_object.h"
+#include "dungeon_room_selector.h"
+#include "dungeon_canvas_viewer.h"
+#include "dungeon_object_selector.h"
 
 namespace yaze {
 namespace editor {
@@ -190,6 +193,7 @@ class DungeonEditor : public Editor {
   uint64_t current_palette_group_id_ = 0;
 
   ImVector<int> active_rooms_;
+  int current_active_room_tab_ = 0; // Track which room tab is currently active
 
   GfxGroupEditor gfx_group_editor_;
   PaletteEditor palette_editor_;