Foldable TOC entries for Markdown files

[kenjioman]

Thanks for the great progress with this extension! I am loving the new features!

Perhaps this is already on the roadmap, but I noticed folding TOC entries in Markdown files (or their previews) is not currently implemented. This would be a great addition/ extension of the awesome work you guys have done with TOC entry folding for notebooks!

[ian-r-rose]

This is a nice idea. In order for it to work, we would probably need to implement code folding upstream (the closest issue is jupyterlab/jupyterlab#4083).

[kenjioman]

As a point of clarification, my comment was about folding the TOC entries (leaving the view of the MD file untouched), but I guess folding the actual MD content could be nice too!

[ian-r-rose]

Ah, sorry, I misunderstood! Yes, the first thing should be more doable in the short-term 😄

[kenjioman]

No problem, and awesome! :)