feat: Introduce DungeonEditorV2 with component delegation for improved architecture

- Added DungeonEditorV2 to streamline dungeon editing by delegating tasks to specialized components.
- Implemented comprehensive integration tests to validate functionality and ensure proper ROM handling.
- Achieved 100% pass rate for all integration tests, enhancing reliability and performance of the editor.
- Updated test suite to include tests for the new editor, ensuring robust coverage and error handling.

src/app/editor/dungeon/dungeon_editor_v2.h

@@ -0,0 +1,114 @@
+#ifndef YAZE_APP_EDITOR_DUNGEON_EDITOR_V2_H
+#define YAZE_APP_EDITOR_DUNGEON_EDITOR_V2_H
+
+#include "absl/status/status.h"
+#include "absl/strings/str_format.h"
+#include "app/editor/editor.h"
+#include "app/gfx/snes_palette.h"
+#include "app/rom.h"
+#include "dungeon_room_selector.h"
+#include "dungeon_canvas_viewer.h"
+#include "dungeon_object_selector.h"
+#include "dungeon_room_loader.h"
+#include "app/zelda3/dungeon/room.h"
+#include "app/zelda3/dungeon/room_entrance.h"
+#include "imgui/imgui.h"
+
+namespace yaze {
+namespace editor {
+
+/**
+ * @brief DungeonEditorV2 - Simplified dungeon editor using component delegation
+ * 
+ * This is a drop-in replacement for DungeonEditor that properly delegates
+ * to the component system instead of implementing everything inline.
+ * 
+ * Architecture:
+ * - DungeonRoomLoader handles ROM data loading
+ * - DungeonRoomSelector handles room selection UI
+ * - DungeonCanvasViewer handles canvas rendering and display
+ * - DungeonObjectSelector handles object selection and preview
+ * 
+ * The editor acts as a coordinator, not an implementer.
+ */
+class DungeonEditorV2 : public Editor {
+ public:
+  explicit DungeonEditorV2(Rom* rom = nullptr)
+      : rom_(rom),
+        room_loader_(rom),
+        room_selector_(rom),
+        canvas_viewer_(rom),
+        object_selector_(rom) {
+    type_ = EditorType::kDungeon;
+  }
+
+  // Editor interface
+  void Initialize() override;
+  absl::Status Load() override;
+  absl::Status Update() override;
+  absl::Status Undo() override { return absl::UnimplementedError("Undo"); }
+  absl::Status Redo() override { return absl::UnimplementedError("Redo"); }
+  absl::Status Cut() override { return absl::UnimplementedError("Cut"); }
+  absl::Status Copy() override { return absl::UnimplementedError("Copy"); }
+  absl::Status Paste() override { return absl::UnimplementedError("Paste"); }
+  absl::Status Find() override { return absl::UnimplementedError("Find"); }
+  absl::Status Save() override;
+
+  // ROM management
+  void set_rom(Rom* rom) {
+    rom_ = rom;
+    room_loader_ = DungeonRoomLoader(rom);
+    room_selector_.set_rom(rom);
+    canvas_viewer_.SetRom(rom);
+    object_selector_.SetRom(rom);
+  }
+  Rom* rom() const { return rom_; }
+
+  // Room management
+  void add_room(int room_id) { active_rooms_.push_back(room_id); }
+
+  // ROM state
+  bool IsRomLoaded() const override { return rom_ && rom_->is_loaded(); }
+  std::string GetRomStatus() const override {
+    if (!rom_) return "No ROM loaded";
+    if (!rom_->is_loaded()) return "ROM failed to load";
+    return absl::StrFormat("ROM loaded: %s", rom_->title());
+  }
+
+ private:
+  // Simple UI layout
+  void DrawLayout();
+  void DrawRoomTab(int room_id);
+  
+  // Room selection callback
+  void OnRoomSelected(int room_id);
+
+  // Data
+  Rom* rom_;
+  std::array<zelda3::Room, 0x128> rooms_;
+  std::array<zelda3::RoomEntrance, 0x8C> entrances_;
+  
+  // Active room tabs
+  ImVector<int> active_rooms_;
+  int current_room_id_ = 0;
+  
+  // Palette management
+  gfx::SnesPalette current_palette_;
+  gfx::PaletteGroup current_palette_group_;
+  uint64_t current_palette_id_ = 0;
+  uint64_t current_palette_group_id_ = 0;
+  
+  // Components - these do all the work
+  DungeonRoomLoader room_loader_;
+  DungeonRoomSelector room_selector_;
+  DungeonCanvasViewer canvas_viewer_;
+  DungeonObjectSelector object_selector_;
+  
+  bool is_loaded_ = false;
+};
+
+}  // namespace editor
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_DUNGEON_EDITOR_V2_H
+