Update nextjs monorepo to v16

Author: renovate[bot]

package.json

@@ -48,7 +48,7 @@
     "hyphen": "^1.10.6",
     "jsonwebtoken": "^9.0.3",
     "lucide-react": "^0.559.0",
-    "next": "15.5.7",
+    "next": "16.0.9",
     "nodemailer": "^7.0.11",
     "payload": "3.68.2",
     "payload-oauth2": "^1.0.19",
@@ -74,7 +74,7 @@
     "dotenv": "^17.2.3",
     "env-cmd": "^11.0.0",
     "eslint": "^9.39.1",
-    "eslint-config-next": "15.5.7",
+    "eslint-config-next": "16.0.9",
     "eslint-plugin-check-file": "^3.3.1",
     "eslint-plugin-perfectionist": "^4.15.1",
     "postcss": "^8.5.6",