DeepSeek Harness Plugin: dsh-silent-pwsh

`dsh-silent-pwsh` is a client plugin for DeepSeek-Harness designed to resolve the disruption caused by sandbox processes popping up black console windows. It enables silent execution by hiding windows and fixes flickering issues during task tree termination and sandbox capability probing. Installation requires DeepSeek-Harness, Node, and pnpm to already be installed on the system and can be done via the official command or a local script. The plugin is self-healing and automatically checks patch status at startup. Additionally, the documentation provides methods for customizing the installation directory and resolving dependency conflicts.