dsh-team-runner: DeepSeek Harness Multi-Agent Orchestration Plugin

`dsh-team-runner` is a plugin for DeepSeek Harness designed to address the problems of duplicated logic and difficult centralized policy management in multi-agent collaboration. It encapsulates distributed `subagents` invocations into reusable team definitions and supports standardized role-based collaboration for planning, writing, and review. The plugin’s core features include team execution, delegation, listing queries, and concurrency policy gating. Users must define the team structure in a configuration file and specify sub-agent providers, such as `spawn`. With this tool, users can simplify multi-agent orchestration workflows, making it especially suitable for projects that require fixed workflows or standardized components.