docs: 阶段0 技术验证（选型/架构/原型与验证记录）

prototype/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "new-markdown-stage0-prototype",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "test": "vitest run",
+    "typecheck": "tsc -b --pretty false"
+  },
+  "dependencies": {
+    "@milkdown/kit": "7.23.0",
+    "react": "18.3.1",
+    "react-dom": "18.3.1"
+  },
+  "devDependencies": {
+    "@types/react": "18.3.11",
+    "@types/react-dom": "18.3.1",
+    "@vitejs/plugin-react": "4.3.3",
+    "jsdom": "25.0.1",
+    "typescript": "5.6.3",
+    "vite": "5.4.11",
+    "vitest": "2.1.5"
+  }
+}