Add runtime layer for Bun on AWS Lambda (#2009)

packages/bun-lambda/example/lambda.ts

@@ -0,0 +1,33 @@
+import type { Server, ServerWebSocket } from "bun";
+
+export default {
+  async fetch(request: Request, server: Server): Promise<Response | undefined> {
+    console.log("Request", {
+      url: request.url,
+      method: request.method,
+      headers: request.headers.toJSON(),
+      body: request.body ? await request.text() : null,
+    });
+    if (server.upgrade(request)) {
+      console.log("WebSocket upgraded");
+      return;
+    }
+    return new Response("Hello from Bun on Lambda!", {
+      status: 200,
+      headers: {
+        "Content-Type": "text/plain;charset=utf-8",
+      },
+    });
+  },
+  websocket: {
+    async open(ws: ServerWebSocket): Promise<void> {
+      console.log("WebSocket opened");
+    },
+    async message(ws: ServerWebSocket, message: string): Promise<void> {
+      console.log("WebSocket message", message);
+    },
+    async close(ws: ServerWebSocket, code: number, reason?: string): Promise<void> {
+      console.log("WebSocket closed", { code, reason });
+    },
+  },
+};