Add deployment documentation and enhance project setup scripts

- Introduced `DEPLOYMENT.md` for comprehensive deployment instructions.
- Added `start.bat` and `start.sh` scripts for unified project startup on Windows and Linux/Mac.
- Updated `.gitignore` to exclude additional files and directories.
- Enhanced `main.py` to serve static frontend files and handle SPA routing.
- Configured Vite to output the frontend build to the backend public directory.
- Minor adjustments in `ReviewDetail.tsx` for improved data handling.

frontend/src/pages/ReviewDetail.tsx

@@ -16,8 +16,9 @@ export default function ReviewDetail() {
   const { data: review, isLoading } = useQuery({
     queryKey: ['review', id],
     queryFn: () => getReview(Number(id)),
-    refetchInterval: (data) => {
+    refetchInterval: (query) => {
       // Refetch if review is in progress
+      const data = query.state.data;
       return data?.status && ['pending', 'fetching', 'analyzing', 'commenting'].includes(data.status) 
         ? 5000 
         : false;