A continuation of #44 with the requested features separated out. These proposals don't really count as mod compatibility since they don't depend on other mods being present.

• Leaf piles for all leaves, ones closer to snow layers than carpet
• Lecterns for each wood type
• Bookshelves for each wood type

Closes #44.

After thinking about it, I don't think that these things are necessarily fit for Terrestria itself. Lecterns and Bookshelves should probably be done by FabriBlocks when it updates to 1.16 (since it does those for Vanilla woods), and leaf piles could probably be done by another mod too.