feat(auth): implement user authentication with JWT and NextAuth

- Added user registration and login functionality with JWT authentication.
- Created auth controller, service, and module in the backend.
- Implemented user model and user products management.
- Integrated NextAuth for session management on the frontend.
- Added middleware for protecting routes and handling public access.
- Updated frontend API routes to include authorization headers.
- Enhanced recipe and user product models to support ownership and visibility.
- Created registration and login pages in the frontend.
- Added necessary types for NextAuth session management.

frontend/app/api/quick-import-proxy/route.ts

@@ -1,17 +1,19 @@
 import { NextRequest, NextResponse } from 'next/server';
+import { getAuthHeaders } from '../../../lib/auth-headers';
 
 export async function POST(request: NextRequest) {
   try {
     const contentType = request.headers.get('content-type') ?? '';
     const isMultipart = contentType.includes('multipart/form-data');
     const backendUrl = process.env.NEXT_PUBLIC_API_URL_INTERNAL || 'http://recipe-api:8080';
+    const authHeaders = await getAuthHeaders();
 
     const response = await fetch(`${backendUrl}/api/quick-import`, {
       method: 'POST',
       body: isMultipart
         ? await request.formData()
         : JSON.stringify(await request.json()),
-      headers: isMultipart ? undefined : { 'Content-Type': 'application/json' },
+      headers: isMultipart ? { ...authHeaders } : { 'Content-Type': 'application/json', ...authHeaders },
       cache: 'no-store',
     });