feat(editor): enhance EditorManager with card-based editor functionality

- Introduced methods to determine if an editor is card-based and to retrieve its category.
- Implemented a sidebar toggle shortcut (Ctrl+B) for managing card visibility.
- Added functionality to hide current editor cards when switching editors.
- Updated editor initialization to register global shortcuts for activating specific editors.
- Enhanced the Update method to draw a sidebar for the current category editor.

Benefits:
- Improved user experience by organizing editor cards and providing quick access to editor categories.
- Streamlined editor management, making it easier to switch between different editing contexts.

src/app/gui/themed_widgets.cc

@@ -254,50 +254,7 @@ void ThemedProgressBar(float fraction, const ImVec2& size, const char* overlay)
 // ============================================================================
 // Palette Editor Widgets
 // ============================================================================
-
-bool PaletteColorButton(const char* label, const yaze::gfx::SnesColor& color,
-                       bool is_selected, bool is_modified,
-                       const ImVec2& size) {
-  const auto& theme = GetTheme();
-
-  int style_count = 0;
-
-  // Draw modified indicator with warning border
-  if (is_modified) {
-    ImGui::PushStyleColor(ImGuiCol_Border, ConvertColorToImVec4(theme.warning));
-    ImGui::PushStyleVar(ImGuiStyleVar_FrameBorderSize, 2.0f);
-    style_count++;
-  }
-
-  // Draw selection border (overrides modified if both)
-  if (is_selected) {
-    ImGui::PushStyleColor(ImGuiCol_Border, ConvertColorToImVec4(theme.accent));
-    ImGui::PushStyleVar(ImGuiStyleVar_FrameBorderSize, 3.0f);
-    if (is_modified) {
-      ImGui::PopStyleVar();  // Remove modified border style
-      ImGui::PopStyleColor();  // Remove modified border color
-    }
-    style_count = 1;  // Override count
-  }
-
-  // Convert SNES color to ImGui format
-  ImVec4 col = ConvertSnesColorToImVec4(color);
-
-  // Draw color button
-  bool clicked = ImGui::ColorButton(label, col,
-                                    ImGuiColorEditFlags_NoAlpha |
-                                    ImGuiColorEditFlags_NoPicker |
-                                    ImGuiColorEditFlags_NoTooltip,
-                                    size);
-
-  // Cleanup styles
-  if (style_count > 0) {
-    ImGui::PopStyleVar();
-    ImGui::PopStyleColor();
-  }
-
-  return clicked;
-}
+// NOTE: PaletteColorButton moved to color.cc
 
 void ColorInfoPanel(const yaze::gfx::SnesColor& color,
                    bool show_snes_format,