Implement SimpleNote Web API - full REST API with Express

- Express server with CORS, JSON middleware
- Auth middleware (Bearer token)
- Document CRUD with markdown storage
- Library CRUD with nested support
- Tag indexing and search
- Error handler middleware
- Config from env vars
- Init script for data structure

package.json

@@ -6,9 +6,21 @@
   "type": "module",
   "scripts": {
     "start": "node src/index.js",
-    "dev": "node --watch src/index.js"
+    "dev": "node --watch src/index.js",
+    "init": "node scripts/init-data.js"
   },
   "keywords": ["documents", "markdown", "api"],
   "author": "OpenClaw Team",
-  "license": "MIT"
+  "license": "MIT",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.4.5",
+    "express": "^4.21.0",
+    "gray-matter": "^4.0.3",
+    "js-yaml": "^4.1.0",
+    "uuid": "^9.0.1"
+  },
+  "devDependencies": {
+    "nodemon": "^3.1.4"
+  }
 }