Manual Interruption by semantic classification logic

[coffeine16]

Name: Keshav Agrawal, student at The LNM Institute of Technology, Jaipur
Key features:

• Agent continues speaking during soft acknowledgements (example: "yeah", "okay")
• Agent listens while speaking and interrupts only on meaningful user intent.
• Even if there is a soft acknowledgement but overall meaning is to interrupt, the agent understands. (example: "Yeah but wait", "Alright stop")
• Prevents accidental cutoffs caused by filler words

How to Test:
python examples/voice_agents/basic_agent.py dev
OR
python examples/voice_agents/keshav.py console