Hopo Better Underwater Ruins

--- 1.20.2-1.20.4 And more SICK stuff --- ♦ New mob skeleton added around the cities ♦ Maked cities more weird to generate again... ok for real this time, it was needed since i don't want to generate too many of them and want to make them feel more special ♦ New funny advancement, find all the underwater structures, you will be award with lots of XP ♦ Added lots of new small ruins, cold and warm variants, i probably added like 30 new ones, i don't remember ♦ Tweaked loots once again, so people complain it was too op, and i agree ♦ POTS!!! lots of pots everywhere... with potions, and some resource to find in those, really cool ♦ Tweaked how cities generate, adding more small ruins around the structure. ♦ Rarely some pufferfish will generate around the structure, don't touch them tho. ♦ Changed how some pieces looked, adding some small details. ♦ 1.20.2-1.20.4 support, and 1.20.5 too but it might show an error at this point. ♦ Maked /locate structure command a little clean, will change to my other proyects too! ♦ Fun swimming!