1.5.1 — sample fix, material cards, second output page

Fixed

• The mob farm accepted only entity cards; spawn eggs, spawner items and modded mob containers work again (a "living entity" check used EntityType#getBaseClass(), which answers Entity.class for every type).
• The Auto Farm opened the mob farm's screen (its menu was registered under the wrong menu type).

Added

• Four random material cards: Ore, Crop, Tree and Plant. Put one in the matching machine and every batch draws a random sample of that category. Cards are not consumed and always produce something (empty draws are re-rolled).
• The Auto Farm and the Auto Ore Farm now have a second output page, so a full output buffer no longer blocks production.

Both 1.21.1 and 26.1.2 builds are attached.