upgrade pipecat and add xai stt and tts

[katstankiewicz]

• upgrade pipecat to >1.0.0
• upgrade deepgram to >=7.0 (to use flux multilingual)
• add xai stt and tts

[katstankiewicz]

this setting is moved to user turn strategies enable_interruptions and defaults to True

[raghavm243512]

I think Deepgram TTS will require this format now for new version:

    elif model_lower == "deepgram":
        logger.info(f"Using Deepgram TTS: {params['model']}")
        return DeepgramTTSService(
            api_key=api_key,
            sample_rate=SAMPLE_RATE,
            settings=DeepgramTTSService.Settings(
                model=params["model"],
                voice=params.get("voice", "aura-2-helena-en"),
                language=language_code,
            ),
        )