Runner has label 'host' not 'docker'. Jobs were stuck in 'waiting to
run' because no runner matched the docker label. Also removed the
cachix/install-nix-action steps since Nix is already available on the
host runner.
Consolidate 4 separate workflows into 2:
- ci.yml (pull_request): flake-check -> build-hosts
- deploy.yml (push to main): flake-check -> deploy + build-pi-images
Previously, deploy and build-pi-image ran on push to main without
any checks. Now flake-check must pass before anything gets deployed
or built.
- Add automatic SD image builds for Raspberry Pi via Forgejo Actions
- Enable binfmt emulation on cryodev-main for aarch64 cross-builds
- Add sd-image.nix module to cryodev-pi configuration
- Create comprehensive docs/ structure with installation guides
- Split installation docs into: first-install (server), reinstall, new-client (Pi)
- Add lib/utils.nix and apps/rebuild from synix
- Fix headplane module for new upstream API (tale/headplane)
- Fix various module issues (mailserver stateVersion, option conflicts)
- Add placeholder secrets.yaml files for both hosts
- Remove old INSTRUCTIONS.md (content moved to docs/)
