Feature request: support for snow like layers

[IndigoGollum]

Carpeted Stairs currently doesn't support snow layers on stairs and slabs, which means it doesn't fix the vanilla issue of stair roofs in snowy areas always being clean. I think supporting a single layer of multi-layer blocks like snow layer or Supplementaries' ash would be enough. Having snow layers form naturally on slabs and stairs when it snows would also be nice if it's possible.

[MehVahdJukaar]

Snow real magic does that