Make transcludes fold-able

[ankushg]

I'd love it transcludes could also be collapsed with a <!-- fold --> tag!

I frequently have sections where I transclude things like:

• weekly goals into the daily notes page
• last year's journal entry into today's daily notes page

Would love to be able to hide them by default 😄

[liamcain]

Closing these old tickets since the new version is a lot different. Feel free to add feedback for the new version though!