Update nextjs monorepo to v14

Author: renovate[bot]

apps/demo/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@davidevmod/focus-trap": "workspace:^",
-    "next": "13.4.8",
+    "next": "14.2.5",
     "react": "18.2.0",
     "react-dom": "18.2.0"
   },
@@ -24,7 +24,7 @@
     "@types/react-dom": "18.2.14",
     "autoprefixer": "10.4.20",
     "eslint": "9.9.0",
-    "eslint-config-next": "13.4.8",
+    "eslint-config-next": "14.2.5",
     "postcss": "8.4.41",
     "prettier": "3.3.3",
     "prettier-plugin-tailwindcss": "0.6.6",