feat(auth): add NextAuth.js with credentials provider

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/package.json

@@ -14,11 +14,14 @@
   },
   "dependencies": {
     "@prisma/client": "^5.10.0",
+    "bcryptjs": "^2.4.3",
     "next": "14.2.0",
+    "next-auth": "^4.24.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   },
   "devDependencies": {
+    "@types/bcryptjs": "^2.4.6",
     "@types/node": "^20.11.0",
     "@types/react": "^18.2.0",
     "@types/react-dom": "^18.2.0",