DeepSeek Harness Plugin: dsh-preset-run

`yigesama/dsh-preset-run` is a plugin for DeepSeek Harness designed to reuse agent preset capabilities through a programmatic interface instead of manual web operations. By registering the `preset_run` tool, it allows launching independent sub-sessions from any session to perform a task and return the result. Install it with `dsh plugin add`, then restart the service. Use it by providing a preset ID and task text; custom timeouts are supported. Usage notes include permission control (configuring `danger-full-access` is recommended for unattended operation), one-time disposal of sub-sessions, and directory access restrictions for the `router-spec` preset.