Support automatic Ctrlplane versions triggered by GitHub Releases

[jsbroks]

We should enable Ctrlplane to automatically create releases when a GitHub repository publishes a new release.

This would allow teams to use GitHub as the source of truth for versioning while keeping Ctrlplane in sync without manual intervention.

Key challenge:

• How do we associate a Ctrlplane deployment with a specific GitHub repository and release events?

Potential option:

• Add metadata to a deployment specifying:
  • GitHub repo (owner/name)
  • Optional filters (e.g., tags, prereleases)
  • Ctrlplane listens for release webhooks and creates the corresponding release