dsh-deep-clone: Deep Cloning Capabilities in the DSH Plugin Environment

`dsh-deep-clone` is a DeepSeek Harness (DSH) plugin maintained by uckkk, designed to address the need for deep cloning in session data processing. The plugin is implemented in pure Node.js, has no network dependencies, and offers fast and stable execution. Users must meet the version requirements of `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`, then install it via the `dsh plugin add` command to use it in sessions. The plugin is open-sourced under the MIT license and runs with DSH process privileges.