Scaffold and configure a production-ready SvelteKit PWA with opinionated defaults. Use when: creating a new web application, setting up a SvelteKit project, building a PWA, or when a user asks to "build me an app/site/webapp". Handles full setup including TypeScript, Tailwind, Skeleton + Bits UI components, testing, linting, and Vercel deployment. Generates a PRD with user stories for review, then upon user approval, builds through development, staging, and production with user approval at each stage.