feat: Add run init script functionality for worktrees

This commit introduces the ability to run initialization scripts for worktrees, enhancing the setup process. Key changes include:

1. **New API Endpoint**: Added a POST endpoint to run the init script for a specified worktree.
2. **Worktree Routes**: Updated worktree routes to include the new run init script handler.
3. **Init Script Service**: Enhanced the Init Script Service to support running scripts asynchronously and handling errors.
4. **UI Updates**: Added UI components to check for the existence of init scripts and trigger their execution, providing user feedback through toast notifications.
5. **Event Handling**: Implemented event handling for init script execution status, allowing real-time updates in the UI.

This feature streamlines the workflow for users by automating the execution of setup scripts, improving overall project management.

apps/ui/src/lib/electron.ts

@@ -1716,6 +1716,47 @@ function createMockWorktreeAPI(): WorktreeAPI {
         },
       };
     },
+
+    getInitScript: async (projectPath: string) => {
+      console.log('[Mock] Getting init script:', { projectPath });
+      return {
+        success: true,
+        exists: false,
+        content: '',
+        path: `${projectPath}/.automaker/worktree-init.sh`,
+      };
+    },
+
+    setInitScript: async (projectPath: string, content: string) => {
+      console.log('[Mock] Setting init script:', { projectPath, content });
+      return {
+        success: true,
+        path: `${projectPath}/.automaker/worktree-init.sh`,
+      };
+    },
+
+    deleteInitScript: async (projectPath: string) => {
+      console.log('[Mock] Deleting init script:', { projectPath });
+      return {
+        success: true,
+      };
+    },
+
+    runInitScript: async (projectPath: string, worktreePath: string, branch: string) => {
+      console.log('[Mock] Running init script:', { projectPath, worktreePath, branch });
+      return {
+        success: true,
+        message: 'Init script started (mock)',
+      };
+    },
+
+    onInitScriptEvent: (callback) => {
+      console.log('[Mock] Subscribing to init script events');
+      // Return unsubscribe function
+      return () => {
+        console.log('[Mock] Unsubscribing from init script events');
+      };
+    },
   };
 }