Fix music issue, add metadata infos for .mp3

1. Fixing weird things happen to Left To Rot music (Discover by one person during OST Composing Jam 4).
2. Adding basic metadata info and cover art to all mp3.

As currently writing during OST Composing Jam 4 event, Itch Io does not allow to replace old zip file (which contain the issue)

Please download the newest update of soundtrack though here:

https://drive.google.com/file/d/1_7Cd65QW0DEDl-8vQrIlfazZCwFLQlah/view?usp=shari...

We will soon replace the old zip after the event.

Happy listening everyone,

The 3 Mouseketeers