Style variations: merge child and parent variation

[jffng]

What problem does this address?

#46554 enabled child themes to inherit the parent theme's style variation.

If the child theme contains a variation of the same name as its parent, the parent variation is overwritten.

What is your proposed solution?

It could be useful for the variations to merge, instead of being overwritten. This would make it much simpler for a child variation to modify just a few aspects of a parent's variation.

cc @WordPress/block-themers

[annezazu]

I'll flag this in the FSE Outreach Program next week too just in case :) Interesting use case to consider.

[MaggieCabrera]

I wonder if that could include a way to simply remove the parent's variations from the child, since in many cases, they just won't be relevant or simply look bad but the themer won't necessarily want to override them.