feat: turborepo monorepo scaffold and provisioning

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

lib/scaffold/turborepo/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "{{project-slug}}",
+  "private": true,
+  "scripts": {
+    "build": "turbo run build",
+    "dev": "turbo run dev",
+    "lint": "turbo run lint",
+    "type-check": "turbo run type-check",
+    "test": "turbo run test",
+    "clean": "turbo run clean && rm -rf node_modules"
+  },
+  "devDependencies": {
+    "turbo": "^2.3.3"
+  },
+  "packageManager": "pnpm@9.15.0",
+  "workspaces": ["apps/*", "packages/*"]
+}