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

frontend/web/src/main.ts

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+const webSocket = new WebSocket('http://localhost:3000');
+
+webSocket.onerror = (e: Event) => {
+  console.error(`${new Date().toISOString()} [WebSocket] error [%o]`, e);
+};
+
+webSocket.onopen = () => {
+  console.log(`${new Date().toISOString()} [WebSocket] open`);
+};
+
+webSocket.onmessage = () => {
+  console.log(`${new Date().toISOString()} [WebSocket] message!`);
+};

frontend/web/src/style.css

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+body {
+  margin: 0px;
+  padding: 0px;
+}

frontend/web/src/vite-env.d.ts

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+/// <reference types="vite/client" />