Add Explore registry: OAuth, Turso, lexicons, indexer worker, and app-store UI
- atproto OAuth (PAR/PKCE/DPoP) with client metadata and JWKS routes
- Registry lexicons, well-known serving, PDS profile PUT/DELETE APIs
- Turso-backed sessions, search, featured rail, avatar proxy
- Jetstream indexer for Fly.io; publish-featured script for curator record
- Explore browse/detail/create/manage pages with i18n and styles
- Env example, README setup notes, tooling and lint fixes
Made-with: Cursor