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/graphics/palette_editor.cc

@@ -2,6 +2,7 @@
 
 #include "absl/status/status.h"
 #include "absl/strings/str_cat.h"
+#include "app/core/performance_monitor.h"
 #include "app/gfx/snes_palette.h"
 #include "app/gui/color.h"
 #include "imgui/imgui.h"
@@ -171,6 +172,8 @@ absl::Status DisplayPalette(gfx::SnesPalette& palette, bool loaded) {
 void PaletteEditor::Initialize() {}
 
 absl::Status PaletteEditor::Load() {
+  core::ScopedTimer timer("PaletteEditor::Load");
+  
   if (rom()->is_loaded()) {
     // Initialize the labels
     for (int i = 0; i < kNumPalettes; i++) {

src/app/editor/graphics/screen_editor.cc

@@ -6,6 +6,7 @@
 
 #include "absl/strings/str_format.h"
 #include "absl/strings/string_view.h"
+#include "app/core/performance_monitor.h"
 #include "app/core/platform/file_dialog.h"
 #include "app/core/window.h"
 #include "app/gfx/arena.h"
@@ -29,6 +30,8 @@ constexpr uint32_t kRedPen = 0xFF0000FF;
 void ScreenEditor::Initialize() {}
 
 absl::Status ScreenEditor::Load() {
+  core::ScopedTimer timer("ScreenEditor::Load");
+  
   ASSIGN_OR_RETURN(dungeon_maps_,
                    zelda3::LoadDungeonMaps(*rom(), dungeon_map_labels_));
   RETURN_IF_ERROR(zelda3::LoadDungeonMapTile16(