Add colorwheel effect, refactor library

[tekktrik]

1. Adds the colorwheel effect for applicable widget "indicators"! Cycle all the colors!
2. Refactor the libraries to be able to more flexibly add widgets. Because widgets can vary wildly in how they work and what they do, generalizing effects is a challenge. There's a lot of refactoring here to set the stage for the ability to both be flexible in adding widgets via PR, while having some sort of standardized "methodology" for each effect.

It's worth noting that while the library is new, this is technically API breaking! However the new API should be future proof. Using an enums instead of isinstance() because that would require importing the libraries even if they're not used, which could be a lot if more libraries are ever added. Also didn't want to use __qualname__ or anything like that because that means subclasses won't be recognized. Using explicit enums saves both the memory and allows effects to work for subclasses.

[FoamyGuy]

Looks good to me. Tested successfully on PyPortal Titano. Great work @tekktrik Thank you.