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/server/src/lib/worktree-metadata.ts

@@ -21,6 +21,12 @@ export interface WorktreeMetadata {
   branch: string;
   createdAt: string;
   pr?: WorktreePRInfo;
+  /** Whether the init script has been executed for this worktree */
+  initScriptRan?: boolean;
+  /** Status of the init script execution */
+  initScriptStatus?: 'running' | 'success' | 'failed';
+  /** Error message if init script failed */
+  initScriptError?: string;
 }
 
 /**