Set up fork-based translation with /doc-locale/ja-jp directory in forked charts/gitlab project

Overview

Implement automated translation workflow for the /tech-docs-forked-projects/prod/gitlab-chart project documentation using Argo automation. This is part of a broader initiative to enable fork-based translation across all GitLab documentation projects.

Implementation

1. Add argo_translation.yml configuration file to the Chart production fork, with configured source and target languages, translation request key (e.g. GITTECH), labels for translation MRs (e.g.gitlab-translation-service), and/docs-locale/ja-jp/** as the target directory for translated content
2. Merge the configuration MR into main-translation branch
3. This configuration will trigger Argo to send the file for translation to Phrase TMS
4. GitLab Argo Bot will return the translated file as a merge request (Translation MR), creating the /doc-locale/ja-jp/ directory structure in our production fork 🎉