refactor: migrate to pnpm monorepo with Payload CMS backend and Astro frontend to support scalable website development and AI-assisted workflows

turbo.json

@@ -0,0 +1,23 @@
+{
+  "$schema": "https://turbo.build/schema.json",
+  "tasks": {
+    "dev": {
+      "cache": false,
+      "persistent": true
+    },
+    "build": {
+      "dependsOn": ["^build"],
+      "outputs": ["dist/**", "frontend/dist/**", "backend/dist/**"]
+    },
+    "lint": {
+      "outputs": []
+    },
+    "test": {
+      "dependsOn": ["^test"],
+      "outputs": []
+    },
+    "check": {
+      "outputs": []
+    }
+  }
+}