Add Bun bundle docs and Telegram grammY support

src/telegram/proxy.ts

@@ -0,0 +1,7 @@
+import { ProxyAgent } from "undici";
+
+export function makeProxyFetch(proxyUrl: string): typeof fetch {
+  const agent = new ProxyAgent(proxyUrl);
+  return (input: RequestInfo | URL, init?: RequestInit) =>
+    fetch(input, { ...(init as any), dispatcher: agent } as RequestInit);
+}