chore(deps)(deps-dev): bump nuxt from 3.21.2 to 4.4.2 in /rag-ui

Bumps [nuxt](https://github.com/nuxt/nuxt/tree/HEAD/packages/nuxt) from 3.21.2 to 4.4.2.
- [Release notes](https://github.com/nuxt/nuxt/releases)
- [Commits](https://github.com/nuxt/nuxt/commits/v4.4.2/packages/nuxt)

---
updated-dependencies:
- dependency-name: nuxt
  dependency-version: 4.4.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]