Add Color Spaces and Methods to Convert Between Them

[yoonthegoon]

• [x] Add color spaces:
  • [x] XYZ
  • [x] from xyY
  • [x] from CIELab
  • [x] from CIELuv
  • [x] from sRGB
  • [x] xyY
  • [x] from XYZ
  • [x] CIELab
  • [x] to LCh
  • [x] from XYZ
  • [x] CIELuv
  • [x] to LCh
  • [x] from XYZ
  • [x] LCh
  • [x] sRGB
  • [x] to HSV
  • [x] from XYZ
  • [x] HSV

Also need to add a color wrapper. Ideally, this acts like a simple API allowing users to not have to interact with all the ColorSpace classes directly. Example usage:

>>> from colors import Color
>>> 
>>> c = Color("sRGB", (1, 0, 0))
>>> c
sRGB(1, 0, 0)
>>> c.space = "XYZ"
>>> c
XYZ(0.412456, 0.212673, 0.019334)

[yoonthegoon]

Need to convert XYZ to and from CIELab, CIELuv, and sRGB.

[yoonthegoon]

Need to write setter for values for each color space to ensure its values are bound properly. Also need to write tests ensuring everything works as expected, especially at edge cases (literally).

[yoonthegoon]

TBH this covers what the issue requires. All the other wants, I'll put into a new issue.