This adds support for Spigot 1.21 along with tentative support for Paper with their removal of CraftBukkit relocation.

When using Paper you may run into issues such as not deleting images, slow rendering, tab completion not working etc. If you have an issue with deleting images, use the `/image delete near <distance>` command for an alternative delete methods.

I intend on releasing a full Paper version of this plugin at some point, as it is a much better API to work with, but it will likely be a while.