dsh-blackhead: Blackhead Cleanup Plugin

`dsh-blackhead` is a pure Node plugin for DeepSeek Harness (DSH), maintained by `uckkk`, and focused on providing simulated blackhead cleaning suggestions. At version 0.1.0, the plugin performs local computation by default and does not rely on any external network services. Users can install it using a command and invoke the `blackhead` tool for playful interaction or simulated skincare advice. It is recommended to review the source code and license before installation.