Support oklch as a color format

[V1OL3TF0X]

🚀 Feature request

Add oklch as a colour space for color-picker

🧱 Problem Statement / Justification

There is a - quite sensible - movement to oklch for defining colors - it has a wider range and more natural (to human eye) axes. It also defines colours in a format that is much easier to read and understand. I've yet to see a color picker that enables one to define colours in that space, and I

✅ Proposed solution or API

Adding another Color implementation to @zagjs/color-utilities, which would enable parsing to/ from oklch. From a small look at the repo I think it would suffice, although I'm not familiar, so guidance here would be appreciated.

📝 Additional Information

What resources (links, screenshots, etc.) do you have to assist this effort?

https://evilmartians.com/chronicles/oklch-in-css-why-quit-rgb-hsl
https://bottosson.github.io/posts/oklab/
Also, a look at different interpolation modes in gradients shows that the oklch interpolation is more vivid and "natural" (in my opinion) than the alternatives

I would gladly take care of the PR, just lmk if that's something you see as worth adding

[segunadebayo]

@V1OL3TF0X Sounds good to me. Feel free to give it a shot