DeepSeek Harness GitHub Workflow Plugin

The DeepSeek Harness (DSH) plugin "github-workflows" is built on GitHub CLI and provides DSH with a zero-dependency, unified GitHub operations interface. The plugin includes 11 tools covering the full GitHub ecosystem, including authentication, repositories, pull requests, issues, Actions, Codespaces, search, and API operations. It supports type-safe execution, default security policies, and zero-configuration authentication, making it suitable for complete automated workflows from committing code and creating pull requests to monitoring CI and merging releases.