Directional blocks like stairs can be rotated and mirrored (e.g. when part of the structure) which is useful feature to have for Clay Pots that have drawings on them

Can't be implemented since rotate method does not provide enough context to modify block entity

WARNING: Mirror function doesn't actually mirror shards, instead just rotates them 180 degrees, so shards that are placed perpendicularly to the rotation axis will switch places. I don't know how to fix this without overcomplications, so I hope this is not that big of a deal.