Integrate performance monitoring across various editors

- Added performance monitoring capabilities using ScopedTimer in the DungeonEditor, PaletteEditor, ScreenEditor, MessageEditor, MusicEditor, SpriteEditor, and SettingsEditor classes to track loading times.
- Enhanced the Load methods in each editor to include timing for critical operations, improving performance analysis and optimization.
- Removed unnecessary debug output in the Sprite class to clean up the codebase.

src/app/editor/music/music_editor.cc

@@ -1,6 +1,7 @@
 #include "music_editor.h"
 
 #include "absl/strings/str_format.h"
+#include "app/core/performance_monitor.h"
 #include "app/editor/code/assembly_editor.h"
 #include "app/gui/icons.h"
 #include "app/gui/input.h"
@@ -12,6 +13,7 @@ namespace editor {
 void MusicEditor::Initialize() {}
 
 absl::Status MusicEditor::Load() {
+  core::ScopedTimer timer("MusicEditor::Load");
   return absl::OkStatus();
 }