A desert and Ice update

a new update that focuses on cold biomes and deserts, the features could include new structures, desert variants, and more, and for the ice biomes and icebergs, there could be new mobs like the iceologer, new structures, iceberg fossils, and even Harp seals, these biomes have been quite neglected for the past few years, so a new update for them would add quite a bit of variety to the game