Support for multiple keys in the same crate

[msmanui]

Server Plugin

CrazyCrates

Describe the feature

Being able to have several designs of keys for the same crate. This is useful when you want to change the design of the key and don't want the old keys to become functionless. I would say this is an issue that owner tends to face in their servers, and you have to apply some solutions like a villager that trades keys and all that. With a solution of multiple-keys will be a better experiencie for the server owner and as well for the user.

PhysicalKey:
  Design1:
    Name: '&6&lKey Premium'
    Lore:
    - '&f&Design 1'
    Item: 'TRIPWIRE_HOOK'
    Glowing: true 
  Design2:
    Name: '&e&lKey Premium'
    Lore:
    - '&f&Design 2'
    Item: 'TRIPWIRE_HOOK'
    Glowing: true