Add mushroom sky biome

The mushroom sky biome would be a common biome with huge mushrooms so tall they would reach the sky and would have floating myceluim islands up there too and the giant mushrooms would be their own species of mushroom being colored megenta and having yellow spots and there would be spore mushroom creepers when they blow up they do some damage but would blow up with spores and spread more of them all over where ever they blow up within a 10 block radious for example will make them have a much higher chance to spawn more spore creepers this biome would be a sub biome of the mushroom island biome and would spawn close to them