feat: Implement worktree initialization script functionality

This commit introduces a new feature for managing worktree initialization scripts, allowing users to configure and execute scripts upon worktree creation. Key changes include:

1. **New API Endpoints**: Added endpoints for getting, setting, and deleting init scripts.
2. **Worktree Routes**: Updated worktree routes to include init script handling.
3. **Init Script Service**: Created a service to execute the init scripts asynchronously, with support for cross-platform compatibility.
4. **UI Components**: Added UI components for displaying and editing init scripts, including a dedicated section in the settings view.
5. **Event Handling**: Implemented event handling for init script execution status, providing real-time feedback in the UI.

This enhancement improves the user experience by allowing automated setup processes for new worktrees, streamlining project workflows.

apps/ui/src/components/views/board-view.tsx

@@ -78,6 +78,8 @@ import {
 } from './board-view/hooks';
 import { SelectionActionBar } from './board-view/components';
 import { MassEditDialog } from './board-view/dialogs';
+import { InitScriptIndicator } from './board-view/init-script-indicator';
+import { useInitScriptEvents } from '@/hooks/use-init-script-events';
 
 // Stable empty array to avoid infinite loop in selector
 const EMPTY_WORKTREES: ReturnType<ReturnType<typeof useAppStore.getState>['getWorktrees']> = [];
@@ -255,6 +257,9 @@ export function BoardView() {
   // Window state hook for compact dialog mode
   const { isMaximized } = useWindowState();
 
+  // Init script events hook - subscribe to worktree init script events
+  useInitScriptEvents(currentProject?.path ?? null);
+
   // Keyboard shortcuts hook will be initialized after actions hook
 
   // Prevent hydration issues
@@ -1570,6 +1575,9 @@ export function BoardView() {
           setSelectedWorktreeForAction(null);
         }}
       />
+
+      {/* Init Script Indicator - floating overlay for worktree init script status */}
+      <InitScriptIndicator projectPath={currentProject.path} />
     </div>
   );
 }