Refactor XB internals to not assume /xb-components returns only SDC-powered XB Components

FYI: this now also blocks ✨ Provide the frontend a way to distinguish module and theme components from one another Active .

This is kind of a weird one to approve as there's no great way to test it without literally adding support for non SDC but that is what THIS issue is blocking. Worst case this is a little incomplete but does no harm, so lets let it in to help the other issues move forward.

This still needs src signoff - I'm going to assign to @tedbow who I know is around for the next two days, but anyone in that group could take care of this.

Yep this looks fine

Nice to see this landed! 🤩

Automatically closed - issue fixed for 2 weeks with no activity.