Feat: Add Audio Input Support

## Issue Title:

Enhancement: Add Audio Input Support for Generating Q&A

## Issue Description:

### Problem:
Currently, the software supports only text and PDF input for generating Q&A. However, there is a growing need to include audio input capabilities, allowing users to provide recorded lectures as input data.

### Proposed Solution:
Integrate audio input functionality into the software to enable users to upload recorded lectures. The system should then process these audio files, extract relevant information, and generate Q&A accordingly.

### Expected Behavior:
1. Users should be able to upload audio files in commonly used formats (e.g., MP3, WAV).
2. The software should process audio input, transcribe the content, and extract key points.
3. Generated Q&A should reflect the information presented in the audio lecture accurately.
4. Ensure compatibility and efficiency of audio processing across different platforms and environments.

### Labels:
- enhancement
- feature-request