Documentation on @griffel/postcss-syntax package

[benkeen]

Hey folks! I was hoping to find some better doc on the @griffel/postcss-syntax package. All that's provided is listed here: https://github.com/microsoft/griffel/blob/main/packages/postcss-syntax/README.md

But there's no clear connection between how the syntax being defined in that file is used in @griffel/babel-preset. I'll continue working at it and I'm sure I'll figure it out at some point, but I know other people are equally confused.

Thanks!