dsh-skin-type: A Skin Type Detection Plugin for the DSH Environment

`dsh-skin-type` is a localized plugin for DeepSeek Harness (DSH) that directly determines skin type without an internet connection. It provides a `skin_type` tool through local computation, suitable for agents that require skincare recommendations, and aims to reduce latency while protecting privacy. Users can use it after installing the required dependencies; since the code runs under the current process permissions, source code security should be considered.