CommandAPI

New improvements from 8.5.1:

• #307 Adds a CommandArgument to let users submit commands as an argument
• #334 Adds support for chat components in CommandAPI.fail()
• #338 Adds a way to clone a CommandAPICommand instance using instance.copy()
• #351 Adds support for a ListArgument with the TextArgument backend, to allow inline lists
• #358 Adds a new WorldArgument argument that lets you get a list of Minecraft dimensions
• Adds support for SoundArgument to return string-based sounds via the NamespacedKey
• #352 Adds some helper methods to the LiteralArgument to make it easier to use via a static import
• #357 Adds a Kotlin DSL to register commands in Kotlin!