CPU efficient matrix animations

[zoe-codez]

Issue

Complex animations like a 6 layer border spin, and pulse laser appear to rate limit at a slower rate than the code is attempting to run at. This is likely related to it doing a clear & full redraw each time.

Proposed change

Add an incremental line generator that doesn't need to clear the screen between each render.
This should be done in a way that preserves the existing code, so the two techniques can be woven together if actual updates are needed

[zoe-codez]

BORDER_SPIN_LAYER_BOTTLENECK configuration option can probably be deprecated with this