initial commit — SIP B2BUA + WebRTC bridge with Rust codec engine

Full-featured SIP router with multi-provider trunking, browser softphone
via WebRTC, real-time Opus/G.722/PCM transcoding in Rust, RNNoise ML
noise suppression, Kokoro neural TTS announcements, and a Lit-based
web dashboard with live call monitoring and REST API.

ts_web/index.ts

@@ -0,0 +1,9 @@
+import { appState } from './state/appstate.js';
+import { appRouter } from './router.js';
+import './elements/index.js';
+
+// Initialize URL router.
+appRouter.init();
+
+// Connect to WebSocket once at startup.
+appState.connect();