refactor(voice-call): split manager

extensions/voice-call/src/manager/twiml.ts

@@ -0,0 +1,10 @@
+import { escapeXml } from "../voice-mapping.js";
+
+export function generateNotifyTwiml(message: string, voice: string): string {
+  return `<?xml version="1.0" encoding="UTF-8"?>
+<Response>
+  <Say voice="${voice}">${escapeXml(message)}</Say>
+  <Hangup/>
+</Response>`;
+}
+