dsh-officecli: Enable Agents to Operate Office Documents via Natural Language and Preview in Real Time

The DeepSeek Harness (DSH) plugin dsh-officecli is designed to enable agents to create and edit Office documents (docx/xlsx/pptx) through natural language and display the results in real time in the DSH Web sidebar. The plugin includes a built-in PPT design layer responsible for coordinate calculation and layout, provides 16 AI tools (including low-level primitives and high-level PPT tools), and natively integrates elements such as charts, tables, and diagrams. It supports secure execution, session isolation, and real-time preview. Installation requires OfficeCLI, and the configuration file must be written to `cordis.patch.yml`.