Create WebSocket Server

- Created a WebSocket server with connection handling and message broadcasting
- Added frontend files including HTML, TypeScript, and CSS for a WebSocket test client
- Configured package.json for both server and frontend with necessary scripts and dependencies
- Introduced Prettier configuration for code formatting
- Established a basic structure for handling WebSocket connections and messages

server/package.json

@@ -7,7 +7,11 @@
   "type": "module",
   "main": "index.js",
   "scripts": {
-    "dev": "nodemon --watch 'src/**/*.ts' --exec 'ts-node-esm' src/index.ts"
+    "dev": "nodemon --watch 'src/**/*.ts' --exec 'ts-node-esm' src/index.ts",
+    "format": "prettier --write 'src/**/*.ts'",
+    "lint": "eslint 'src/**/*.ts'",
+    "prelint:fix": "npm run format",
+    "lint:fix": "eslint 'src/**/*.ts' --fix"
   },
   "dependencies": {
     "@techniker-me/logger": "0.0.15"
@@ -19,6 +23,7 @@
     "globals": "14.0.0",
     "jiti": "2.5.1",
     "nodemon": "^3.1.0",
+    "prettier": "3.6.2",
     "ts-node": "^10.9.0",
     "typescript": "^5.0.0",
     "typescript-eslint": "8.42.0"