Summary

This PR implements support for "PLASA ANSI E1.54" colourspace. Note that I found a discrepancy between the whitepoint chromaticity coordinates and its derivation/design:

https://www.mikewoodconsulting.com/articles/Protocol%20Fall%202014%20-%20Color%20Communication.pdf states "Accordingly, the white point is defined as follows as a 2° Planckian source at 3,200 K": x=0.4254, y=0.4044

We compute different chromaticity coordinates:

>>> sd = colour.sd_blackbody(3200)
>>> colour.XYZ_to_xy(
...     colour.sd_to_XYZ(
...         sd, colour.MSDS_CMFS["CIE 1931 2 Degree Standard Observer"]
...     )
... ).round(4)
array([ 0.4234,  0.399 ])

Preflight

Code Style and Quality

• Unit tests have been implemented and passed.
• Pyright static checking has been run and passed.
• Pre-commit hooks have been run and passed.
• New transformations have been added to the Automatic Colour Conversion Graph.
• New transformations have been exported to the relevant namespaces, e.g. colour, colour.models.

Documentation

• New features are documented along with examples if relevant.
• The documentation is Sphinx and numpydoc compliant.