[Request] Easily swap to 6-8 pre-defined colors.

[gohma231]

I'm hoping that a quick color-swapper can be added to this module.

When I run a game in-person. I have a wet-erase mat with 6-8 markers. I'm looking for the online equivalent.

Owlbear.rodeo has a color picker and draw tools that work flawlessly for me. Here is a screenshot with their color picker:

[dev7355608]

This is probably a better fit for the Precise Drawing Tools module, which focuses on making the drawings tools actually work well for drawing.