feat: improve animating colors

[jakex7]

Summary

Currently on Fabric, you cannot animate color properties like fill or stroke using Animated with useNativeDriver: true or Reanimated. That's because we have custom structure that needs to be parsed on JS and looks like:

type ColorStruct = Readonly<{
  type?: WithDefault<Int32, -1>;
  payload?: ColorValue;
  brushRef?: string;
}>;

However, special values like currentColor / context-fill / context-stroke / /^url\(#(.+)\)$/ can not be animated anyway. Instead, we should allow passing ColorValue directly and detect on the native side if its ColorValue or ColorStruct.

Test Plan

Example app -> TestX

Compatibility

OS	Implemented
iOS	✅
MacOS	✅
Android	✅

Checklist

• I have tested this on a device and a simulator
• I added documentation in README.md