feat: add mcp server, reorganize repo

apps/mcp/app/api/mcp/route.ts

@@ -0,0 +1,21 @@
+import { createMcpHandler } from "mcp-handler";
+import { registerDuckTools } from "@/lib/mcp";
+
+export const runtime = "nodejs";
+
+const post = createMcpHandler(
+  async (server) => {
+    registerDuckTools(server);
+  },
+  {
+    serverInfo: { name: "rubber-duck-mcp", version: "1.0.0" },
+  },
+);
+
+export async function GET(req: Request) {
+  return post(req);
+}
+
+export async function POST(req: Request) {
+  return post(req);
+}