Live translation (#61)

* added translator

* fixup

src/dailyai/services/elevenlabs_ai_service.py

@@ -16,16 +16,18 @@ class ElevenLabsTTSService(TTSService):
         aiohttp_session: aiohttp.ClientSession,
         api_key,
         voice_id,
+        model="eleven_turbo_v2",
     ):
         super().__init__()
 
         self._api_key = api_key
         self._voice_id = voice_id
         self._aiohttp_session = aiohttp_session
+        self._model = model
 
     async def run_tts(self, sentence) -> AsyncGenerator[bytes, None]:
         url = f"https://api.elevenlabs.io/v1/text-to-speech/{self._voice_id}/stream"
-        payload = {"text": sentence, "model_id": "eleven_turbo_v2"}
+        payload = {"text": sentence, "model_id": self._model}
         querystring = {"output_format": "pcm_16000", "optimize_streaming_latency": 2}
         headers = {
             "xi-api-key": self._api_key,