Bump next from 13.5.4 to 14.0.0 in /client

Bumps [next](https://github.com/vercel/next.js) from 13.5.4 to 14.0.0.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v13.5.4...v14.0.0)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

client/package.json

@@ -30,7 +30,7 @@
     "clsx": "^2.0.0",
     "lucide-react": "^0.288.0",
     "markdown-to-jsx": "^7.3.2",
-    "next": "13.5.4",
+    "next": "14.0.0",
     "next-themes": "^0.2.1",
     "react": "^18",
     "react-dom": "^18",