Added intelligent interruption handler

[bhavana9381]

Intelligent Interruption Handler

This PR implements a context-aware interruption handling system for the LiveKit AI agent.

##Features Implemented

• Ignore filler words ("yeah", "ok", "hmm") when the agent is speaking
• Interrupt immediately on command words ("stop", "wait", "no")
• Respond normally when the agent is silent
• Handle mixed inputs like "yeah wait" correctly

Approach

• Created a modular InterruptionHandler class
• Used configurable ignore and interrupt word lists
• Implemented state-based logic (speaking vs silent)
• Added normalization for consistent text processing

Demo

The demo.py file demonstrates:

• Ignoring passive acknowledgements during speech
• Interrupting on command inputs
• Responding when the agent is idle

Demo Video

Google Drive Link:
https://drive.google.com/file/d/1iwZsAR12ygVc2SN-7Ts5igoOG3-lHm-4/view?usp=sharing

About Me

Google Drive Link:
https://drive.google.com/file/d/1p06cjjF1-10HASRpJCxhLSXUe50ZRFr0/view?usp=sharing

Note

This solution focuses on logic-layer implementation as required, without modifying the underlying VAD system.