Scaffold a production-ready Home Assistant add-on: config.yaml with UI options schema, multi-arch Dockerfile + build.yaml, s6-overlay services, Ingress web UI wiring, GHCR CI, DOCS/CHANGELOG, and an add-on repository.yaml. Use when creating a new Home Assistant add-on, adding an add-on to a repository, or setting up HA add-on CI/CD. Triggers on: home assistant add-on, hass.io addon, scaffold ha addon, ingress addon, addon repository.
