dsh-github-ci: GitHub Actions CI Management and Visualization Tool

The `dsh-github-ci` plugin for DeepSeek Harness (DSH) is designed to integrate GitHub Actions into DSH's unified interface, addressing the pain point of developers frequently switching between the browser and terminal. It provides a Pipeline Dashboard for real-time monitoring, log viewing, and operations such as canceling or retrying. It also encapsulates the `github_ci` Agent tool, enabling developers to directly trigger, troubleshoot, and fix workflows through conversation. The plugin supports GitHub OAuth Device Flow or PAT authentication, stores permissions persistently, and features failure detection with one-click repair, achieving automated and seamless management of CI processes.