chore: import upstream snapshot with attribution

examples/v1/node-express/src/index.ts

@@ -0,0 +1,63 @@
+import express from "express";
+import * as dotenv from "dotenv";
+dotenv.config();
+import {
+  CopilotRuntime,
+  OpenAIAdapter,
+  copilotRuntimeNodeExpressEndpoint,
+} from "@copilotkit/runtime";
+import OpenAI from "openai";
+import { BuiltInAgent } from "@copilotkit/runtime/v2";
+import cors from "cors";
+
+const openai = new OpenAI();
+const serviceAdapter = new OpenAIAdapter({ openai: openai as any });
+
+const runtime = new CopilotRuntime({
+  agents: {
+    default: new BuiltInAgent({ model: "openai/gpt-4o-mini" }),
+  },
+  actions: [
+    {
+      name: "sayHello",
+      description: "say hello so someone by roasting their name",
+      parameters: [
+        {
+          name: "roast",
+          description: "A sentence or two roasting the name of the person",
+          type: "string",
+          required: true,
+        },
+      ],
+      handler: ({ roast }: { roast: string }) => {
+        console.log(roast);
+        return "The person has been roasted.";
+      },
+    },
+  ],
+});
+
+const copilotRuntime = copilotRuntimeNodeExpressEndpoint({
+  endpoint: "/",
+  runtime,
+  serviceAdapter,
+});
+
+const app = express();
+
+app.use(
+  cors({
+    origin: "*",
+    methods: ["GET", "POST", "OPTIONS", "PUT", "DELETE", "PATCH"],
+    allowedHeaders: ["*"],
+  }),
+);
+
+// Uncomment this line to parse the request body
+// app.use(express.json());
+
+app.use("/copilotkit", copilotRuntime);
+
+app.listen(4000, () => {
+  console.log("Listening at http://localhost:4000/copilotkit");
+});