More diode colors for custom entity statuses

[tiriscef]

What:
When setting a custom status on an entity through the modding API, the status diode can currently only be red, yellow, or green. I'd love to see that set expanded with a few more named colors like blue, white, orange, cyan, purple, infrared, etc.

Why:
The three-color palette makes perfect sense for the original use case, where a status maps cleanly onto "working / backed up / not working."
But I'm setting custom statuses on entities driven by a control script, where the state isn't a simple working-or-not thing. Like for example inhabited houses. With only a red/yellow/green traffic-light palette, I either have to overload those colors with meanings they don't naturally carry, or I lose the at-a-glance distinction that the diode is otherwise great for.

Priority:
Very low I guess. I know this is small and a little frivolous. I figured it might be a cheap win since the diode rendering already exists and it's "just" more color options.