Adds new variants of quarter logs with offset textures. Useful for chisseling and general decor purposes. Can be crafted from regular quarter logs by using a hammer in a crafting grid (centered variant can be made both out of horizontally and vertically offset variants). All variants can be turned back into regular quarter logs by using a saw in a crafting grid. These recipies don't spend tool's durability.

For now I'm not planning to add variants for corner blocks, because of sheer amount of different models needed to be made for them and just general clunkiness of their current implementation in vanilla.