Workflow Init

This handles the first-time setup of Vercel's Workflow SDK across ten different frameworks, from Next.js to Vite. It auto-detects your stack by reading package.json, fetches the correct getting-started guide from workflow-sdk.dev, and walks through installation, configuration, and verification. The smart bit is the sanity check: if workflow is already installed, it tells you to use the /workflow skill instead, which reads from the versioned docs in node_modules. It's basically a framework-aware bootstrap script that knows when to hand off. If you're adding durable workflows to an existing project or starting fresh, this gets you to a working example endpoint without hunting through docs.