Update nextjs monorepo to v14

Author: renovate[bot]

example/package.json

@@ -10,15 +10,15 @@
   },
   "dependencies": {
     "@blazity/next-image-proxy": "1.0.2",
-    "next": "12.3.4",
+    "next": "14.0.1",
     "react": "17.0.2",
     "react-dom": "17.0.2"
   },
   "devDependencies": {
     "@types/node": "^18.0.0",
     "@types/react": "^17.0.39",
     "eslint": "8.46.0",
-    "eslint-config-next": "12.3.4",
+    "eslint-config-next": "14.0.1",
     "typescript": "^5.0.0"
   }
 }