Add color picker popover to ColorInput

[jmaen]

Add color picker popover to ColorInput

[jmaen]

I played around with it a little just for fun, I imagine it could look something like that (sorry for the color artifacts):

[aarthificial]

While it's true that we'll need a color picker sooner or later for the sake of editable signals, I am strongly against using third-party components in the editor as they destroy any sense of consistency in terms of the visuals and the feel.

It's important to keep in mind that Motion Canvas is meant to feel like a desktop application and not a website.
Here's an example of the color picker from Blender:

Most notably, it uses HSV sliders that both look and work the same as any other field in the application.

As such, the color picker should be implemented using our own components.
This shouldn't be too complex as it's just a few sliders and two CSS gradients on top of each other.
We also already depend on chroma-js which provides all the logic necessary for color conversion an manipulation.

[jmaen]

I'll look into that. I guess the new NumberInput will come in handy for the sliders.

[jmaen]

Does it have to be the same layout as in Blender, i.e. one (circular) map for hue and saturation and another one for brightness, or would you also be fine with one map for saturation and brightness and another linear one for hue (as in the gif I sent)? I think the latter would be easier to implement and I like the easy way of keeping the saturation and brightness while playing around with the hue, but I guess that comes down to personal preference.

[aarthificial]

Yes, the square + hue slider from the gif is better. It's common in most drawing software so I think it would be a good default.