epic: refactor SDL2_Renderer usage to IRenderer and queued texture rendering

- Updated the testing guide to clarify the testing framework's organization and execution methods, improving user understanding.
- Refactored CMakeLists to include new platform-specific files, ensuring proper integration of the rendering backend.
- Modified main application files to utilize the new IRenderer interface, enhancing flexibility in rendering operations.
- Implemented deferred texture management in various components, allowing for more efficient graphics handling and improved performance.
- Introduced new methods for texture creation and updates, streamlining the rendering process across the application.
- Enhanced logging and error handling in the rendering pipeline to facilitate better debugging and diagnostics.

src/app/editor/editor_manager.cc

@@ -230,7 +230,9 @@ constexpr const char* kAssemblyEditorName = ICON_MD_CODE " Assembly Editor";
 constexpr const char* kDungeonEditorName = ICON_MD_CASTLE " Dungeon Editor";
 constexpr const char* kMusicEditorName = ICON_MD_MUSIC_NOTE " Music Editor";
 
-void EditorManager::Initialize(const std::string& filename) {
+void EditorManager::Initialize(gfx::IRenderer* renderer, const std::string& filename) {
+  renderer_ = renderer;
+  
   // Point to a blank editor set when no ROM is loaded
   current_editor_set_ = &blank_editor_set_;
 
@@ -2097,6 +2099,8 @@ absl::Status EditorManager::LoadAssets() {
 
   current_editor_set_->overworld_editor_.Initialize();
   current_editor_set_->message_editor_.Initialize();
+  // Initialize the dungeon editor with the renderer
+  current_editor_set_->dungeon_editor_.Initialize(renderer_, current_rom_);
   ASSIGN_OR_RETURN(*gfx::Arena::Get().mutable_gfx_sheets(),
                    LoadAllGraphicsData(*current_rom_));
   RETURN_IF_ERROR(current_editor_set_->overworld_editor_.Load());