Add HelloWorld debug agent and per-chat handler

chat-ui/package.json

@@ -1,11 +1,21 @@
 {
   "name": "chat-ui",
   "version": "1.0.0",
-  "main": "server.js",
+  "main": "dist/server.js",
   "license": "MIT",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/server.js"
+  },
   "dependencies": {
     "express": "^4.18.2",
     "axios": "^1.5.0",
     "body-parser": "^1.20.2"
+  },
+  "devDependencies": {
+    "typescript": "^5.4.5",
+    "@types/express": "^4.17.21",
+    "@types/node": "^20.11.19",
+    "@types/body-parser": "^1.19.5"
   }
 }