build(deps-dev): bump next from 15.5.12 to 16.1.6

Bumps [next](https://github.com/vercel/next.js) from 15.5.12 to 16.1.6.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.12...v16.1.6)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.1.6
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -126,7 +126,7 @@
     "@vitest/coverage-v8": "^3.2.4",
     "connect": "^3.7.0",
     "esbuild": "^0.27.3",
-    "next": "^15.5.12",
+    "next": "^16.1.6",
     "prettier": "^3.8.1",
     "rimraf": "^6.1.3",
     "rollup-plugin-dts": "^6.3.0",