Add preview_markdown route scoped to project/-/
What does this MR do and why?
Part of the effort to move all project routes into
the /-/
scope. Also used in the frontend to
standardize the route across groups and projects
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Related to #442218 (closed)