Start the process of making Hyperverse less bad

[Citymonstret]

Progress:

• Move to checker-qual
• Add the cloud editorconfig
• Switch to Gradle (Kotlin DSL) from Maven
• Add the cloud checkstyle and enforce it
• Switch from text to adventure
• Update MiniMessage
• Switch back to TaskChain. It's better. No reason to use cloud-tasks
• Add missing JavaDoc

TODO:

• (Optional) Switch from ACF to cloud
• Remove the per world inventory stuff. Sad to lose it, but it's too volatile OR OR OR make it less poopy using adventure-nbt