feat(worktree): enhance worktree management and git diff functionality

- Integrated git worktree isolation for feature execution, allowing agents to work in isolated branches.
- Added GitDiffPanel component to visualize changes in both worktree and main project contexts.
- Updated AutoModeService and IPC handlers to support worktree settings.
- Implemented Git API for non-worktree operations, enabling file diff retrieval for the main project.
- Enhanced UI components to reflect worktree settings and improve user experience.

These changes provide a more robust and flexible environment for feature development and testing.

app/src/components/views/board-view.tsx

@@ -184,6 +184,7 @@ export function BoardView() {
     maxConcurrency,
     setMaxConcurrency,
     defaultSkipTests,
+    useWorktrees,
     aiProfiles,
   } = useAppStore();
   const [activeFeature, setActiveFeature] = useState<Feature | null>(null);
@@ -849,7 +850,8 @@ export function BoardView() {
       // Call the API to run this specific feature by ID
       const result = await api.autoMode.runFeature(
         currentProject.path,
-        feature.id
+        feature.id,
+        useWorktrees
       );
 
       if (result.success) {