Add the Crab into the game!!

the crab placed 2nd place in the 2023 mob vote. with the copper golem returning, i think the crab could be a good addition next drop! it has a useful feature (the crab claw), it has a cute design, and it helps bring mangrove swamps more life! its also one of the most popular & loved mob vote losers, so adding it would make alot of people happy