+1 for gitlab. You can programmatically generate a csv file that can be used to generate issue(s) which support markdown format. Then your checklists could be issues and marked as completed when done.
You could also for instance set up a weekly pipeline schedule to generate issue(s) from the csv if some of the issues are needed on an interval.
If gitlab isn’t an option then id still look into generating the .md files this way and finding a home for the .md files that works for your user(s)
Everyone has a hobby 🙃