feat: Implement lazy initialization for Emulator and Renderer

- Updated Emulator to support optional lazy initialization of the renderer, enhancing flexibility during runtime.
- Introduced a new method in IRenderer for creating textures with specific pixel formats, improving texture management for the emulator.
- Refactored texture command processing in Arena to handle empty queues more gracefully.
- Enhanced SDL2Renderer to support the new texture creation method, ensuring compatibility with emulator requirements.

src/app/editor/editor_manager.cc

@@ -233,6 +233,9 @@ constexpr const char* kMusicEditorName = ICON_MD_MUSIC_NOTE " Music Editor";
 void EditorManager::Initialize(gfx::IRenderer* renderer, const std::string& filename) {
   renderer_ = renderer;
   
+  // NOTE: Emulator will be initialized later when a ROM is loaded
+  // We just store the renderer for now
+  
   // Point to a blank editor set when no ROM is loaded
   current_editor_set_ = &blank_editor_set_;
 
@@ -2097,6 +2100,11 @@ absl::Status EditorManager::LoadAssets() {
 
   auto start_time = std::chrono::steady_clock::now();
 
+  // Set renderer for emulator (lazy initialization happens in Run())
+  if (renderer_) {
+    emulator_.set_renderer(renderer_);
+  }
+
   current_editor_set_->overworld_editor_.Initialize();
   current_editor_set_->message_editor_.Initialize();
   // Initialize the dungeon editor with the renderer