feat: Complete Smart Resume Formatter with R2 and Gemini AI integration

- Integrated Cloudflare R2 for template storage and converted file management
- Added Google Gemini AI for resume parsing and HTML generation
- Created backend API endpoints for templates, conversion, and history
- Refactored frontend to use real API instead of mock data
- Fixed Docker networking issues (IPv6/IPv4) for R2 connectivity
- Added resumeService.ts for frontend API integration
- Updated Vite configuration for proper asset serving in Docker
- Successfully tested with 13 templates from R2 bucket

frontend/components/Spinner.tsx

@@ -0,0 +1,13 @@
+
+import React from 'react';
+import { LoaderCircle } from 'lucide-react';
+
+const Spinner: React.FC = () => {
+  return (
+    <div className="flex justify-center items-center py-10">
+      <LoaderCircle className="w-10 h-10 text-primary animate-spin" />
+    </div>
+  );
+};
+
+export default Spinner;