Is your feature request related to a problem? Please describe.

No standard way to document Jinja templates?

Describe the solution you'd like

I just realized it would be nice to have a handler for documenting and auto-generating docs for Jinja templates.
It would parse the templates and extract information from Jinja comments for macros, filters, tests and context.

Describe alternatives you've considered

Manually written Markdown docs.

Additional context

Would be super useful for handlers themselves!