PR: Implement missing number of terms from Cheung's (2004) polynomial transforms

[chnmasta05]

Summary

Fixes #616.

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.
• [N/A] New transformations have been added to the Automatic Colour Conversion Graph.
• [N/A] New transformations have been exported to the relevant namespaces, e.g. colour, colour.models.

Documentation

• [N/A] New features are documented along with examples if relevant.
• The documentation is Sphinx and numpydoc compliant.

[KelSolaar]

Awesome and thanks a lot @chnmasta05!

[KelSolaar]

Do you have a contributor name you would like for citation purposes? https://zenodo.org/record/7367239

[chnmasta05]

Thank you! Please use Xiaohan Chen as my name, where Chen is the surname.

[KelSolaar]

Awesome thanks!