Custom Animation System

**Is your feature request related to a problem? Please describe.**
A custom animation system for boards that has more complex LED.

**Describe the solution you'd like**
I already made a solution for my own fork. https://github.com/203Electronics/Matrix-Bootloader/commit/5be0be79d0ea44c26edaed1cd995f1df341e1f5d
But I would prefer this is supported upstream.

**Describe alternatives you've considered**
Mentioned above,

**Additional context**
https://github.com/203Electronics/Matrix-Bootloader/blob/bbea776965f24ec35122fcb3a7a0941923276599/ports/espressif/boards/boards.c#L197
Add this line to make ws2812 more stable.
(Still glitches out sometimes, not sure why that is the case. I assume this has to with tinyUSB irq?)

Start with ports/espressif/boards/boards.c around line 197 and compare the linked Matrix-Bootloader commit. Review the proposed custom animation behavior and the WS2812 stability note, including the possible TinyUSB IRQ interaction. Done means an agreed upstream animation system is supported and the reported LED glitches are addressed or clearly explained.

Written by the indexing model from the issue text.