TFC: Silkworms

-removed crooks, as they didnt have any functions outside of breaking leaves and harvesting habitats
--functions have now been given to hoes
--updated icon to match. it looks bad, i know.
-updated advancements

-sick silkworm habitats are now able to infect or increase the stage of infection of nearby habitats at the same rate the infected habitat attempts increment its stage
-reduced the time it takes for an infected habitat to roll for an attempt to increment its stage from 2 days to 1.5 days
-updated habitat textures
-reduced the amount of light habitats block
-habitats are now broken faster with a hoe