Color: PsychoJS uses `util.Color` while PsychoPy uses `colors.Color`

[TEParsons]

This causes problems like this user was having: https://github.com/psychopy/psychopy/issues/4344

when auto translating from Python to JS - if they were in the same place, they'd be able to do colors.Color('red') in Python and it would be new colors.Color('red') in JS. I can add to the transcriber that colors.Color needs to translate as util.Color, but in the interest of synchronicity shouldn't the libraries be structured the same as much as possible?

[apitiot]

Since there is no "colors" sub-directory under the "psychopy" directory, I would advocate for the transpiler to take care of this. Also "Color.js" would be very lonely in its own "colors" sub-directory.