This repo ran its own separate copy of Postgres, Zitadel and SeaweedFS,
none of which are actually wired into the Go backend yet (auth and file
storage are still unchecked TODOs in the README). Removed that unused
duplicate stack (deploy/docker-compose.dev.yml, deploy/postgres-init/)
in favor of the shared Infrastructure repo also used by Musify and Ping.
make dev-infra now brings up Infrastructure instead, and backend/.env.example
points at its ports (Postgres on dockermanager_db, Zitadel, SeaweedFS)
as placeholders for when those features are implemented.
Turn the root README into a proper project overview: what the app
does today, the stack, how to run it locally and the current status,
instead of the short Spanish setup notes it had before. Replace the
generic SvelteKit scaffold README in frontend/ with a short one that
actually describes this client.