Add self-referential parent/child relation on AffirmationCategory for
one-level hierarchy. Update AffirmationForm with two-level category and
sub-category dropdowns, server actions with find-or-create hierarchy
logic, AffirmationList with Parent
This is a pretty far-developed starting point. Authentication has been intialized with Better-Auth, a database has been setup with Prisma, and Google + email logins have been enabled, as well as Google + Email registration.