Add Nuxt third party logo

Purpose

Add Nuxt third party logo to be used for pages astro template.

We have received Third-party Trademark approval to use Nuxt logo: https://gitlab.com/gitlab-com/legal-and-compliance/-/issues/2571#note_2407492378

Screenshots

Checklist

For a new icon and/or illustration:

• Link to related design issue:
• If this adds an icon ensure that it follows the new icon checklists.
• If this adds an illustration ensure that it follows the new illustration checklists.

For third-party trademarks:

• If this adds or updates an icon or illustration that includes a third-party trademark, ensure that it follows the process for adding third-party trademarks to GitLab.