Some way to distinguish audio files after generating

### Feature Idea

When I browse my output folder, I can easily distinguish generated images and videos by their thumbnails. Not only distinguish them visually, but it also gives me an idea of what a given project was about. I can't do that with audio files. They don't have any cover art, so all I have is the usual file name pattern of `ComfyUI_0123`. That's all I have to distinguish them and there is no way for me to know what the song is about without listening to it. This would be okay if I only had a few, but with tens or hundreds of files, this gets annoying.

I have two feature ideas that could help with this.
1. Add a node to allow the user to input the song title. This string could be then added to the file name after the prefix, for example: `ComfyUI_0123_Song Name.mp3`. Or it could be added to the audio file's metadata, so that the user can see it in an audio player.
2. Add an optional feature to automatically create and add cover art to the audio file.
- Variant A: draw a black rectangle with white text containing the song title. This would allow the user to quickly see what the project was about without having to listen to the audio
- Variant B: create a random low resolution image for the cover art. Something like avatars on GitHub. This wouldn't be AI generated, just some simple math. It wouldn't tell the user what the song is about, but it would make it easier to distinguish the audio files
- Variant C: do both - create an image with text containing the song title on a random background

I realise that the second feature probably sounds more like a job for a custom node, but maybe if it's simple enough, it could still be added to the core? Or maybe the first feature would be enough on its own?

### Existing Solutions

_No response_

### Other

_No response_