Add RunSDK function that orchestrates SDK-only releases by:
- Validating config and SDK configuration
- Determining version from git tags or config override
- Running optional breaking change detection via oasdiff
- Generating SDKs for configured languages (unless dry run)
The function supports dry run mode for previewing what would be done
without actually generating SDKs.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
