Support auto-resize text to fit stickynote on whiteboard

[samtuke]

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Additional context
For quick collaboration, you want to be able to create lots of sticky notes in a short space of time on a whiteboard to get ideas down fast. Manually resizing text for every sticky note is a bunch of clicks too many and gets in the way of creativity. You want the text to be as readable as possible on every sticky note - not have acres of empty whitespace around tiny text by default. Also ideally you want all the stickynotes to be the same size, as in real life usually, and not have to resize sticky notes.

I'm used to using Ideaflip which handles this well enough. Whiteboards feel unusuable in a production context for my team until it's fast to write lots of sticky notes collaboratively without getting bogged down with manual text fiddles over and over again.

Thanks!