Update nextjs monorepo to v16

Author: renovate[bot]

package.json

@@ -47,7 +47,7 @@
     "graphql": "^16.12.0",
     "jsonwebtoken": "^9.0.3",
     "lucide-react": "^0.556.0",
-    "next": "15.5.7",
+    "next": "16.0.8",
     "nodemailer": "^7.0.11",
     "payload": "3.66.0",
     "payload-oauth2": "^1.0.19",
@@ -72,7 +72,7 @@
     "dotenv": "^17.2.3",
     "env-cmd": "^11.0.0",
     "eslint": "^9.39.1",
-    "eslint-config-next": "15.5.7",
+    "eslint-config-next": "16.0.8",
     "eslint-plugin-check-file": "^3.3.1",
     "eslint-plugin-perfectionist": "^4.15.1",
     "postcss": "^8.5.6",