dsh-octal: Octal Conversion

The DeepSeek Harness (DSH) plugin `dsh-octal` is designed to provide agents with local octal number conversion capabilities that do not rely on external services. Maintained by `uckkk`, the plugin is implemented in pure Node.js and requires no network requests. It can be installed using `dsh plugin add github:uckkk/dsh-octal`, and used by directly invoking the registered tool. Users should ensure that the environment includes the `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools` dependencies, and note that the plugin runs with the permissions of the current process. It is suitable for scenarios sensitive to network dependencies or where local processing is required.