Backporting to 1.21.4

This update adds content from newer versions of the mod.

Due to the backport, the versioning system had to be changed. The mod now uses the same semantic version for different versions of Minecraft in the format <major>.<minor>.<patch>-<minecraftversion>.

New features

• Added the Archives structure that contains exploration maps that bring to the mod's biomes
• Backported integrations with other mods
• The spawning of modded mobs can now be tweaked in the config

Fixes

• Reitroduced some tweaks that were lost when the mod was updated from Underground Jungle to Underground Worlds