refactor(editor): integrate EditorCardRegistry for improved card management

- Updated EditorManager and various editor components to utilize EditorCardRegistry for card registration and visibility management, enhancing dependency injection and modularity.
- Refactored card registration logic across multiple editors, ensuring a consistent approach to managing editor cards.
- Improved UI coordination by delegating visibility checks and card management to the new registry, streamlining the user experience.

Benefits:
- Simplifies card management, leading to a more organized and efficient user experience.
- Enhances maintainability by clearly defining roles for card handling and editor operations, aligning with the overall architecture improvements.

src/app/editor/editor_manager.h

@@ -310,10 +310,9 @@ class EditorManager {
   bool show_emulator_ = false;
   bool show_memory_editor_ = false;
   bool show_asm_editor_ = false;
-  bool show_imgui_metrics_ = false;
-  bool show_imgui_demo_ = false;
   bool show_palette_editor_ = false;
   bool show_resource_label_manager = false;
+  // Note: show_imgui_demo_ and show_imgui_metrics_ moved to UICoordinator
   // Workspace dialog flags (managed by EditorManager, not UI)
   bool show_workspace_layout = false;
   bool show_save_workspace_preset_ = false;