Compound variants support

[IonianPlayboy]

Hello, thanks for developping this project, it looks very promising.

I was wondering if supporting compound variants (aka variants that are a combination of multiple variants) was planned at some point ? This is currently the main thing I find missing and that's making me hesitate to use pinceau in my own projects.

Here is for reference the cva (Class Variance Authority) documentation that shows an example of compound variants.