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.

backend/package.json

@@ -15,8 +15,13 @@
   "dependencies": {
     "@nestjs/common": "^10.3.0",
     "@nestjs/core": "^10.3.0",
+    "@nestjs/jwt": "^10.2.0",
+    "@nestjs/passport": "^10.0.3",
     "@nestjs/platform-express": "^10.3.0",
     "@prisma/client": "6.12.0",
+    "bcryptjs": "^2.4.3",
+    "passport": "^0.7.0",
+    "passport-jwt": "^4.0.1",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.15.1",
     "multer": "^1.4.5-lts.2",
@@ -31,9 +36,11 @@
     "@nestjs/cli": "^10.3.0",
     "@nestjs/schematics": "^10.1.1",
     "@nestjs/testing": "^10.3.0",
+    "@types/bcryptjs": "^2.4.6",
     "@types/express": "^4.17.21",
     "@types/multer": "^1.4.12",
     "@types/node": "^22.15.29",
+    "@types/passport-jwt": "^4.0.1",
     "@types/pdf-parse": "^1.1.5",
     "@types/uuid": "^10.0.0",
     "prisma": "6.12.0",