0006: Env file layout
pnpm env:pull writes development values to .env.local so .env.development.local can hold local Supabase overrides.
0008: CLI on citty, clack and c12
The centrakit CLI moves from commander and hand-written helpers to citty, @clack/prompts, c12 and Node 24 built-ins, and the guard tests scan files with fs.glob and oxc-parser.
