Add CLF parsing capabilities.

[MichaelMauderer]

Summary

Adds a module that allows contains the functionality and data structures to parse CLF files. This is the first step to add full support for CLF into colour.

Preflight

Code Style and Quality

• [x] Unit tests have been implemented and passed.
• [x] Pyright static checking has been run and passed.
• [x] 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

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

More docs and examples to come in follow-up PRs, once we can do more than parse the CLF files.