Add support for pygame.PixelArray

Currently there's no support for this object.

[hodgestar]

@Yardanico Would you be up to trying to add support? Happy to review a PR or give suggestions on where to start.

@hodgestar sorry, I mistakenly closed that issue, I'm not really into Python development anymore, but I think it would be better to keep that issue here

[hodgestar]

Np!