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

libs/types/src/settings.ts

@@ -295,6 +295,8 @@ export interface ProjectRef {
   isFavorite?: boolean;
   /** Lucide icon name for project identification */
   icon?: string;
+  /** Custom icon image path for project switcher */
+  customIconPath?: string;
 }
 
 /**
@@ -600,6 +602,10 @@ export interface ProjectSettings {
   /** Project-specific board background settings */
   boardBackground?: BoardBackgroundSettings;
 
+  // Project Branding
+  /** Custom icon image path for project switcher (relative to .automaker/) */
+  customIconPath?: string;
+
   // UI Visibility
   /** Whether the worktree panel row is visible (default: true) */
   worktreePanelVisible?: boolean;