When Dungeons Arise - Forge!

- Added a check to make it less likely for End structures to generate on the main island.

EDIT: About configurations:

- Config file has been removed. This isn't actually my choice, but Mojang is making configurations significantly harder to implement for structure mods that work thanks to the datapack system, like this one.

- Alternatively, most features can be changed by datapacks. This includes the biomes the structure can spawn in, and will also allow you to tweak separation, spacing, salt, size, and other internal values. Please don't come to me for a tutorial on how to make datapacks, there's plenty of material online. I may make an example datapack for next releases, but you can just extract the mod's 'resources/data' folder to get a glimpse of its structure and files.