Uncloud deployment workflows

Build, push, and roll out services on an Uncloud cluster. Use this whenever the user wants to run `uc deploy`, `uc run`, `uc build`, or `uc image push`, ship code from a compose file, do a zero-downtime rolling update, push locally built images to cluster machines, wire up CI/CD for Uncloud, configure rollbacks and health-check gating, or target a specific context/machine for a deployment. Trigger on phrases like "deploy to uncloud", "uc deploy", "uc run", "uc build", "ship this app", "rolling update", "push my image to the cluster", "uncloud ci pipeline", "skip health checks emergency deploy", "private registry with uncloud", or any request to get code running on an Uncl…