Fix documentation site menu
Restructure documentation menu:
- Add links to the readme
- Update configuration links
- Remove links to external documentation
Bug: T352262
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
Restructure documentation menu:
Bug: T352262