Merge docs-gitlab-com docs translations upstream 2025-07-17

What does this MR do and why?

This MR pushes all available translations from the main-translation branch of our production fork to the upstream GitLab Docs repository.

Changes Overview

1. Adds translated content for documentation pages
2. Ensures consistent formatting across all translated files
3. Maintains directory structure alignment with the original English content

Related: gitlab-com/localization/docs-site-localization#312 (closed)

Screenshots, screen recordings, or links to review app

These are strongly recommended to assist reviewers and reduce the time to merge your change.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Configure a local GitLab Docs environment.
2. Check out this branch.

Merge request acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this merge request.