[Mega-Thread] pen support/annotation/handwriting/scratchpad

This is a list of all feature requests that have to do with adding handwriting capabilities to RemNote from oldest to newest. Although they do have some overlaps, they differ enough to not merge them all together:

Hello Remnote team!
I see there’re lots of requests to add image annotation already,
and I’d like to add a similar request to make some sort of a canvas to make flow charts, diagrams, mind maps, etc…
This type of non-linear learning is really helpful.

Please post all feature requests on the feedback platform. Some of what you are requesting is covered in this request