Set up Vercel Web Analytics integration - #1

Implemented Vercel Web Analytics integration for the UR Exam Planner frontend.

## Changes Made

### Modified Files:
1. **src/App.jsx**
   - Added import for Analytics component from @vercel/analytics/react
   - Wrapped Routes with a fragment and added <Analytics /> component
   - This enables automatic route tracking and visitor analytics

### Dependency Updates:
1. **package.json**
   - Added @vercel/analytics@^1.6.1 as a production dependency
2. **package-lock.json**
   - Updated with @vercel/analytics and its dependencies

## Implementation Details

The project is a Vite + React application with react-router-dom for routing. Following the Vercel Web Analytics documentation for React applications:

- Used the @vercel/analytics/react package which provides the Analytics component
- Added the Analytics component at the root level (App.jsx) to track all pages and routes
- The Analytics component is placed after Routes to track page navigations across the entire app
- Route support is automatically handled by the @vercel/analytics/react package

## Verification

✓ Build completed successfully with Vite
✓ No linting errors reported
✓ All dependencies installed correctly
✓ Package manager lock files updated

## Next Steps for Deployment

1. Enable Web Analytics in the Vercel dashboard for this project
2. Deploy to Vercel using `vercel deploy` or via git integration
3. Once deployed, analytics data will be available in the Vercel dashboard under the Analytics tab
4. Visitor tracking and page views will be automatically collected

## Notes

- The Analytics component has no route support warnings with the @vercel/analytics/react package
- The implementation preserves the existing app structure and functionality
- No breaking changes introduced

Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>