CIELUV and polar CIELUV support

## Description

When this feature is available in D3's upcoming release. Existing `hcl` arguments should be renamed `lch` and added spaces and interpolators for LUV need added in.

See:
https://observablehq.com/@mbostock/luv-and-hcl

Should also add LUV and polar LUV into the converter tool

## Why do you need this feature?

Support all the color spaces

## Leonardo package and version

## Additional context

Start with the existing hcl color-space implementation and the converter tool, then compare their expected behavior with the linked D3 LUV and HCL reference. Done means CIELUV and polar CIELUV are supported, existing hcl arguments are renamed to lch, LUV spaces and interpolators are available, and both spaces appear in the converter.

Written by the indexing model from the issue text.