Make use of color type

[Vurv78]

Throughout Wiremod and E2, vector is often used as a replacement for a color.

This works but leads to pollution of methods / functions in E2 for color-based things that take vectors, and performance hits since Vectors need to be converted to Color structs before being used by GLua.

There's already an entry in WireLib.DT for Color, so why hasn't it been used?

So I propose adding a color type to E2, and potentially to use it in place of vector in certain wire components with backwards compatibility if possible.

[thegrb93]

Backwards compatibility with existing e2s will be the issue here.

[Vurv78]

I don't see how there'd be any backwards compatibility issues E2 wise since you can just make an overload that takes a color instead of a vector or vector4 for certain functions, and deprecate the ones taking vectors.

Now wiremod yes, if we try and say replace the light color input to take a color instead of vector. Although I think a system to allow multiple types of input would be possible for backwards compat. Just kinda hard

[Vurv78]

I also forgot to mention that vector4's sole purpose is practically to act as a color, which is really weird, so could deprecate it almost entirely.