Add complete multiplayer system with real-time gameplay, challenge system, and 50x50 board option

node_modules/engine.io/build/transports/index.d.ts

@@ -0,0 +1,16 @@
+import { Polling as XHR } from "./polling";
+import { WebSocket } from "./websocket";
+import { WebTransport } from "./webtransport";
+declare const _default: {
+    polling: typeof polling;
+    websocket: typeof WebSocket;
+    webtransport: typeof WebTransport;
+};
+export default _default;
+/**
+ * Polling polymorphic constructor.
+ */
+declare function polling(req: any): XHR;
+declare namespace polling {
+    var upgradesTo: string[];
+}