feat: turborepo monorepo scaffold and provisioning

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/scaffold/turborepo/README.md

@@ -0,0 +1,43 @@
+# {{project-name}}
+
+A full-stack monorepo managed by [Vibn](https://vibnai.com), powered by [Turborepo](https://turbo.build).
+
+## Apps
+
+| App | Path | Purpose |
+|-----|------|---------|
+| `product` | `apps/product` | Core user-facing application |
+| `website` | `apps/website` | Marketing and landing pages |
+| `admin` | `apps/admin` | Internal admin tooling |
+| `storybook` | `apps/storybook` | Component browser and design system |
+
+## Shared Packages
+
+| Package | Path | Purpose |
+|---------|------|---------|
+| `@{{project-slug}}/ui` | `packages/ui` | Shared React components |
+| `@{{project-slug}}/tokens` | `packages/tokens` | Design tokens (colors, spacing, typography) |
+| `@{{project-slug}}/types` | `packages/types` | Shared TypeScript types |
+| `@{{project-slug}}/config` | `packages/config` | Shared eslint and tsconfig |
+
+## Getting Started
+
+```bash
+pnpm install
+pnpm dev
+```
+
+## Running a specific app
+
+```bash
+turbo run dev --filter=product
+turbo run dev --filter=website
+```
+
+## Building
+
+```bash
+pnpm build
+# or a single app
+turbo run build --filter=product
+```