Structure Update

This update focuses specifically on new naturally generated structures, so no new mobs, unless they're part of the structure. None of these ideas are mine, all are ideas I've seen on YouTube. Please don't remove this idea for similarity, it's a relatively unique set of ideas. So basically this would add in a bunch of structures like the Oasis, Cave Village, Venture, Pillager Factory, Pillager Mineshaft, Obsidian Spikes in the Nether, Nether Ships, Piglin Village, Badlands Village, Badlands Temple, End shipwrecks, Illager Theater, Abandoned Quarry, Abandoned Cabin, Swamp Village, Jungle Village, Expanded Dungeons, Giant leviathan skeletons in the desert, stray-infested ice temples, and Illager Pirate ships. Credits go to Skip the Tutorial and Whimzee on YouTube.