DeepSeek Harness (DSH) plugin: dsh-pr-checks sidebar displays PR check status

The DSH plugin `dsh-pr-checks` aims to solve the problem of frequent PR build-status checks interrupting workflows during agent development. It uses the `gh` CLI to move GitHub Actions status to the bottom of the sidebar, supports hierarchical display by Workspace, Project, and PR, and provides progress bars and color-coded status dots. It features automatic filtering of in-progress tasks, configurable filtering (for example, by specific user or repository), and non-invasive installation. Installation requires `gh` CLI authentication and can be enabled via command line or manual configuration.