services: restructure base AI services into modules

src/pipecat/services/deepgram/stt.py

@@ -19,7 +19,7 @@ from pipecat.frames.frames import (
     UserStoppedSpeakingFrame,
 )
 from pipecat.processors.frame_processor import FrameDirection
-from pipecat.services.ai_services import STTService
+from pipecat.services.stt_service import STTService
 from pipecat.transcriptions.language import Language
 from pipecat.utils.time import time_now_iso8601
 

src/pipecat/services/deepgram/tts.py

@@ -16,7 +16,7 @@ from pipecat.frames.frames import (
     TTSStartedFrame,
     TTSStoppedFrame,
 )
-from pipecat.services.ai_services import TTSService
+from pipecat.services.tts_service import TTSService
 
 try:
     from deepgram import DeepgramClient, SpeakOptions