DeepSeek Harness Plugin: ppt-master-cloner

The DeepSeek Harness plugin `ppt-master-cloner` is designed to address the inconvenience of manually maintaining the `ppt-master` upstream source code. By automatically installing it, performing a shallow clone, and checking for updates every 6 hours, it ensures that the Agent can access the latest PPT generation capabilities at any time. Once the plugin is activated, the Agent can directly use the `ppt_master` tool to generate PPTs. It supports operations such as checking status and forcing updates, and provides configuration options to customize behaviors such as the local path and update frequency. The plugin has no external dependencies, is solely responsible for source-code maintenance, and does not include specific PPT generation logic.