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/system/settings_editor.cc

@@ -3,6 +3,7 @@
 
 #include "absl/status/status.h"
 #include "app/core/features.h"
+#include "app/core/performance_monitor.h"
 #include "app/gui/style.h"
 #include "imgui/imgui.h"
 
@@ -23,7 +24,10 @@ using ImGui::TableSetupColumn;
 
 void SettingsEditor::Initialize() {}
 
-absl::Status SettingsEditor::Load() { return absl::OkStatus(); }
+absl::Status SettingsEditor::Load() { 
+  core::ScopedTimer timer("SettingsEditor::Load");
+  return absl::OkStatus(); 
+}
 
 absl::Status SettingsEditor::Update() {
   if (BeginTabBar("Settings", ImGuiTabBarFlags_None)) {