GitHub Action: skillfortify/scan@v1 for CI/CD integration

Planning a GitHub Action for automated skill scanning in CI/CD pipelines:

```yaml
- uses: skillfortify/scan@v1
  with:
    path: .
    severity-threshold: high
```

This would enable teams to block PRs that introduce malicious or unsafe skills. Tracking interest — thumbs-up this issue if you'd use it.