WIP: First iteration of a markdown linter
What does this MR do?
Add proper markdown linting to the documentation.
Checklist
- Conform by the code review guidelines
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Has been reviewed by a Technical Writer :) -
Has been reviewed by someone involved in the build plans
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What are the relevant issue numbers?
Relates to: https://gitlab.com/gitlab-org/gitlab-ce/issues/47704
/label ~backstage ~Documentation
Edited by Lukas 'ai-pi' Eipert