dsh-formula-stage: Formula Stage

The DSH ecosystem emphasizes plugin extensibility. This article introduces `dsh-formula-stage` (formula stage), an online tool plugin. The plugin is implemented purely in Node.js, has no network dependencies, and focuses on parameter calculation and recommendation output. The installation command is `dsh plugin add github:uckkk/dsh-formula-stage`. No additional configuration is required; after installation, it can be invoked directly in a session. Before use, the dependency requirements for `@deepseek-ai/cordis` (^4.0.1) and `@deepseek-ai/dsh-tools` (>=0.1.0-rc.6) must be satisfied.