Help Wanted: upgrading Redwood Auth package to Firebase v11

Any Firebase Auth users out there? We intended to include the Firebase admin v11 upgrade along with Redwood v5 but ran into last minute bugs and didn’t have time to sort 'em.

The PR is open if anyone is able to lend a hand and take lead (with full Core Team support, of course):

cc @dom

Quick update, this one’s been moved on: