Enhancement: Set a 'required' parameter for a frontmatter field that will annoy editors until it is defined. #369
Description
Is your feature request related to a problem? Please describe.
Some fields need to be filled in for the site design to work as intended and for SEO.
Describe the solution you'd like
Set a parameter required: true on a content type field, that will first highlight the field red when not filled out, and then raise a warning on save until the field is filled out. Basically, be annoying to the editor until the requirements are satisfied.
Describe alternatives you've considered
Telling people to remember to fill it out, checklists, pre-build script to check all files for required fields. It would be better to have some information in the UI at the time of editing, instead of after the files are saved, committed to the repo.
Additional context
Add any other context or screenshots about the feature request here.