dsh-mask-frequency: Return Clear Recommendations Based on Parameters

The DeepSeek Harness (DSH) plugin `dsh-mask-frequency` is designed to provide parameter-based decision support. Belonging to the "Fun Dress-Up" category, its core function is "mask frequency." It is implemented entirely in pure Node.js and has no network dependencies. Before use, install the dependencies `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`, and install the plugin using the specified GitHub link. Once enabled, its registered tool can be invoked in a session to process parameters and obtain recommendations. Since it runs with the permissions of the current process, review the source code to verify security before deployment.