Dungeons and Taverns End Castle Standalone

Updated to be on par with main DnT by fixing 1.21.5 things and how maps are generated. maps are saved internally in the files. Instead of the loot table rolling for a map it now references the loot table with just the maps. Those are located at Dnt-v4.7/data/nova_structures/loot_table/maps/ new End Castle Key Texture to differentiate it from the End Ship Keys more than just colour and keybeard