Supabase local and supabase sync

[lalalune]

Right now it's kind of hard to set up a new instance, because the supabase stuff doesn't have a clear sync, and can't be run locally without a cloud setup (even though that's free.

• [ ] Add supabase CLI tool and integration
• [ ] Sync current tables, functions, triggers, types and seeds from the current DB
• [ ] Process and documentation to population new supabase local instance
• [ ] Process and documentation for syncing new Supabase cloud instance

[gpt3-bot]

This should be done now, README updated.