Summary

This PR vectorisescolour.temperature.uv_to_CCT_Robertson1968 and colour.temperature.CCT_to_uv_Robertson1968 definitions for 32.78x and 93.61x performance improvement.

The implementation has been verified to reproduce the same values than the non-vectorised version with samples as follows:

• 50 CCT values: 2,000K to 25,000K
• 50 D_uv values: -0.100 to +0.100
• Total: 2,500 samples

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.