feat: enhance project management with custom icon support and UI improvements

- Introduced custom icon functionality for projects, allowing users to upload and manage their own icons.
- Updated Project and ProjectRef types to include customIconPath.
- Enhanced the ProjectSwitcher component to display custom icons alongside preset icons.
- Added EditProjectDialog for inline editing of project details, including icon uploads.
- Improved AppearanceSection to support custom icon uploads and display.
- Updated sidebar and project switcher UI for better user experience and accessibility.

Implements #469

apps/ui/src/lib/electron.ts

@@ -3105,6 +3105,7 @@ export interface Project {
   theme?: string; // Per-project theme override (uses ThemeMode from app-store)
   isFavorite?: boolean; // Pin project to top of dashboard
   icon?: string; // Lucide icon name for project identification
+  customIconPath?: string; // Path to custom uploaded icon image in .automaker/images/
 }
 
 export interface TrashedProject extends Project {