dsh-detergent-dose: Laundry Detergent Dose Plugin

`dsh-detergent-dose` is a lightweight client plugin in the DeepSeek Harness plugin ecosystem, maintained by `uckkk`. The plugin focuses on laundry detergent dosage calculation by registering the `detergent_dose` tool, which returns clear recommendations based on the provided parameters, and is implemented purely in Node.js with no network dependencies. Installation requires only running the `dsh plugin add` command, after which the plugin is automatically loaded. To use it, ensure the environment satisfies the dependencies `@deepseek-ai/cordis` (^4.0.1) and `@deepseek-ai/dsh-tools` (>=0.1.0-rc.6). It is released under the MIT License and is suitable for rapid invocation in agent-based scenarios.