Let the user to interrupt and takevore Conversation

[llamaonsecurity]

Problem Description

Currently, once a prompt audio stream begins playing, the user has no way to cancel or interrupt the playback. This presents multiple issues during development and testing:

• Blocking flow: If the prompt audio is long, it prevents the user from speaking or interacting further until it finishes.
• Debugging difficulty: Developers need to wait for the audio to complete before trying new inputs or inspecting reactions.
• No fallback path: Even if the intent changes mid-stream, the system remains locked until the playback ends.

Proposed Solution

We need to implement a cancel mechanism that allows the user (or the system) to stop the audio stream at any time, with the following behavior:

• Cancel prompt audio stream immediately.
• Fallback to microphone input so that the user can speak without waiting for the prompt to finish