vercel/nextjs-foundations-starter ? reverse-engineered prompt

Build me a clean Next.js monorepo starter for a marketing site and a blog, set up so I can run both together from one repo with pnpm. I want one app for the main website on port 3000 and another for a content hub on port 3001, with shared UI components and a simple mock data layer so the blog can show posts without a real backend yet.

Please make it feel like a real starter I can use right away, with a nice home page, a blog index, and a post detail page or something close to that. Keep the code TypeScript, make sure formatting, linting, and type checking work, and wire up the monorepo so the shared packages are actually used by both apps. If anything depends on current Next.js or Turborepo details, look up the latest docs online and follow best practices.