Add developer guidance to add new charts and components

Clemens Beckrequested to merge
cb-new-chart-docs into master

What does this MR do?

Add developer guidance to add new charts and components

Add guidance and collect best practices to enable other teams to add a new chart/component to the GitLab chart. This aims to improve efficiency, consistency and self-sufficiency of the related product teams and working groups.

Closes https://gitlab.com/gitlab-org/distribution/team-tasks/-/issues/1772

Related issues

Author checklist

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Required

For anything in this list which will not be completed, please provide a reason in the MR discussion.

  • Merge Request Title and Description are up to date, accurate, and descriptive.
  • MR targeting the appropriate branch.
  • MR has a green pipeline.
  • Documentation created/updated.
  • Tests added/updated, and test plan for scenarios not covered by automated tests.
  • Equivalent MR/issue for omnibus-gitlab opened.

Reviewers checklist

Edited by Hossein Pursultani

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