Add KubeJS support

[jaimarl]

Displaying messages using commands is severely limited. It would be nice to get full KubeJS support.

[ahowell610]

I 100% agree. Kubejs support would go a super long way for modpack integration.

More modpack integration = more downloads

[txnitxnichopper]

It already has Kube support because Kube has full Java interop. You can simply grab a reference to the ImmersiveMessage Java class and use the API that way.

I could definitely put some examples of that on the documentation site though

[ToppyTopology]

please send some examples, would love to do this aswell