[Feature]: additional background music

### Summary

I am trying to use my own local mp3 file as the background music, I saved the file in the background audio folder and also changed added entry to background.json to use the local file but the bot keeps asking to use the standard lofi audio file from the YouTube link.

### Is your feature request related to a problem?

Can you add music as background music saved on a local folder

### Describe the solution you'd like

Maybe a way to correctly use additional local audio files as background music

### Describe alternatives you've considered

_No response_

### Additional Context

_No response_