luxueliu-dsh-story: DeepSeek Harness Long-Form Writing Plugin

luxueliu-dsh-story is a long-form writing plugin designed specifically for DeepSeek Harness (DSH), addressing the limitations of native features in long-form writing. It supports dragging file content directly in as context, and provides features such as `/gemini-sum` for story handoff, `/out` for clean export, and `/sum` for archive generation. Installation requires configuring `roots` and `model`, and no repeated configuration in `patch.yml` is needed after installation. The plugin is dedicated to providing users with a complete creative workflow from material management to final output.