add half-working client

client/script.ts

@@ -1,8 +1,14 @@
+import { PresentationManager } from "./presentationmgr";
 import { PythagorasClient } from "./pythagoras_client";
 
 async function main(): Promise<void> {
-	const conn = new PythagorasClient("/ws");
-	console.log(await conn.recv());
+	const ws_client = new PythagorasClient("/ws");
+	document.body.innerHTML = "";
+	const presentation_manager = new PresentationManager();
+	document.body.appendChild(presentation_manager.dom);
+	await presentation_manager.serve(ws_client);
 }
 
-main();
+(<HTMLButtonElement>document.querySelector("#run")).onclick = () => {
+	main();
+}