Midi player update

Changes:
Midi player:
Put Midi files to path Plugins/JW_Piano/Midi and play them
GUI style design:
Buttons contains more information about its usage
Config:
Its possible to adding own Skins/Sounds or edit existing one
View attachment 742896

Permissions:
Threre are new permission for Midi Player
View attachment 742897

API:
For developers, programming api has been added, that means
you can add JW_Piano as dependecy to your plugin and Modify its
behavior. In order to do it use SpigotPiano class

Optional piano = SpigotPiano.create(player.getLocation(), "my new piano");
List pianos = SpigotPiano.getPianos();
SpigotPiano.destroy(piano.get());