dsh-engineer-tools: DeepSeek Harness Plugin for Engineering Commands

dsh-engineer-tools is a pluggable toolset designed for DeepSeek Harness (DSH) to address the inconsistent formats and lack of type constraints when an Agent directly invokes shell scripts in engineering scenarios. The plugin encapsulates scoped Git runners and package manager runners, supports mainstream tools such as npm and pnpm, and provides easily extensible templates. The tools run with Agent permissions, are constrained by a sandbox, and can be invoked via the `git` and `dev` commands, enabling standardized and secure execution of engineering commands.