Update nextjs monorepo to v16

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
     "@vercel/analytics": "1.5.0",
     "hosted-git-info": "8.1.0",
     "lru-cache": "10.4.3",
-    "next": "15.5.4",
+    "next": "16.0.0",
     "react": "19.2.0",
     "react-dom": "19.2.0",
     "styled-components": "6.1.19",
@@ -42,7 +42,7 @@
     "@kachkaev/eslint-config-react": "0.6.0",
     "@kachkaev/markdownlint-config": "0.5.0",
     "@kachkaev/prettier-config": "2.1.3",
-    "@next/eslint-plugin-next": "15.5.4",
+    "@next/eslint-plugin-next": "16.0.0",
     "@tsconfig/next": "2.0.3",
     "@tsconfig/strictest": "2.0.6",
     "@types/hosted-git-info": "3.0.5",