Brainstorm 3D visualizers and tools for making them

[liammulh]

We might eventually want some 3D visualizers.

Library Ideas:

• p5 has some built-in 3D capabilities
• three.js is a very popular 3D library for JavaScript
• other 3D libs?
• "3D SVGs": https://doc.x3dom.org/tutorials/animationInteraction/transformations/example.html

[gwhitney]

They should be possible now using P5GLVisualizer, but leaving this discussion open for other ideas that might be worth implementing.