Support Yaml frontmatter in Markdown files
This should be simpler, but we can't yet use the FrontMatterExtension.
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.
This should be simpler, but we can't yet use the FrontMatterExtension.