- Extract deploy-rs code into separate module (lab/deploy-rs.scm)
- Create new SSH + rsync deployment module (lab/ssh-deploy.scm)
- Make SSH + rsync the default deployment method
- Update help text and examples
- Add options: --boot, --test, --use-deploy-rs
- Supports same workflow as manual: rsync + nixos-rebuild --flake
This provides a faster, simpler deployment method that matches
the manual workflow: sudo nixos-rebuild --flake /path#machine
