1.2 - Custom resources

This fixes some bugs with just hosting a resource pack, and adds the CustomResource record.

Includes 1.19 support, however this means removing the "download resource pack and serve it through resources instead" feature.

1.1 - Bugfixes

Fixes adding credits, FileResources or MetadataParts not working in ResourcePackHandler, oops

1.0 - Resources initial release

Compatible with spigot and minestom