dsh-parallel-dev: DSH Parallel Development Workflow Plugin

`dsh-parallel-dev` is a plugin for DeepSeek Harness (DSH) designed to assist users in handling parallel development workflows. The tool involves architectural concepts such as file ownership, interface contracts, and vertical slicing versus horizontal layering, helping to manage the parallel development of complex tasks. Since detailed official documentation is not provided, users must visit the GitHub repository to install it themselves and inspect the source code to ensure it meets their usage requirements.