Add real-time language interpreter feature

This commit adds a real-time interpreter mode to the Voice Language Translator:
- Implements continuous speech-to-translation capabilities using WebSockets
- Adds background processing threads for audio, transcription, and TTS
- Adds client-side speech detection and streaming
- Updates UI to include real-time interpreter controls
- Adds necessary dependencies (flask-socketio, eventlet)

requirements.txt

@@ -3,3 +3,5 @@ requests
 openai-whisper
 torch
 ollama
+flask-socketio
+eventlet