feat: add change input audio device function

[ao-anam]

Summary by cubic

Enable dynamic mic switching while streaming. Adds a new API to change the input audio device and emits an event when it changes.

• New Features
  • Added AnamClient.changeAudioInputDevice(deviceId) to switch input device during an active stream.
  • Validates streaming state and input audio enabled; requires a deviceId.
  • Stops current track, requests new stream with the deviceId, replaces the peer connection track, and preserves the mute state.
  • Emits AnamEvent.INPUT_AUDIO_DEVICE_CHANGED with deviceId; EventCallbacks updated.

[Copilot]

Pull Request Overview

This pull request adds functionality to change the input audio device during an active streaming session. The implementation allows users to switch between different microphones or audio input devices without interrupting the streaming connection.

Key changes:

• Added new event type for audio device change notifications
• Implemented core device switching logic in StreamingClient
• Exposed public API method through AnamClient with proper validation

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/types/events/public/AnamEvent.ts	Added INPUT_AUDIO_DEVICE_CHANGED enum value
src/types/events/public/EventCallbacks.ts	Added callback type for input audio device change event
src/modules/StreamingClient.ts	Implemented changeAudioInputDevice method with stream replacement logic
src/AnamClient.ts	Added public API method with validation checks

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[cubic-dev-ai]

No issues found across 4 files