Rock Crusher (renewable sand)

Old rock crushers still work, though I recommend replacing them. The item forms dont stack between new and old.

• v7.2: replaced fabricator and book with crafting table recipes
• v7.1: working video link and custom items 64 stackable
• updated for 1.21.5+ format
• improved rock crusher model
  • no more visible Z-fighting
  • more efficient block display handling
• rock crushers can no longer be place on the same block, on other faces