Add Object selector to DungeonEditor

Loads current room gfx from ROM gfx buffer

src/app/editor/dungeon_editor.h

@@ -5,6 +5,8 @@
 
 #include "gui/canvas.h"
 #include "gui/icons.h"
+#include "rom.h"
+#include "zelda3/dungeon/room.h"
 
 namespace yaze {
 namespace app {
@@ -16,7 +18,18 @@ class DungeonEditor {
  private:
   void DrawToolset();
 
+  void DrawDungeonCanvas();
+  void DrawRoomGraphics();
+  void DrawTileSelector();
+
+  bool is_loaded_ = false;
+
+  gfx::Bitmap room_gfx_bmp_;
+
+  std::vector<zelda3::dungeon::Room> rooms_;
+
   gui::Canvas canvas_;
+  gui::Canvas room_gfx_canvas_;
   ImGuiTableFlags toolset_table_flags_ = ImGuiTableFlags_SizingFixedFit;
 };
 }  // namespace editor