Shady's Dark Okami GUI

Additions:

• Added more info to the default music toasts to be in parity with my other music packs, i.e. "C418 - Sweden (Minecraft)"
• Added support for the music toasts in the Biomes O' Plenty mod, i.e. "LudoCrypt - Timber (Biomes O' Plenty)", this way it matches my Biomes O' Plenty Nether BGM pack on Modrinth
• Added the GUI for the Nautilus