Cloudflare turn integration (#264)

* Turn integration

* Add code:

* type hint

* Fix typehint

* add code

* format

* WIP

* trickle ice

* bump version

* Better docs

* Modify

* code

* Mute icon for whisper

* Add code

* llama 4 demo

* code

* OpenAI interruptions

* fix docs

frontend/Index.svelte

@@ -23,6 +23,7 @@
   export let width: number | undefined;
   export let server: {
     offer: (body: any) => Promise<any>;
+    turn: () => Promise<any>;
   };
 
   export let container = false;