Separate consumable item interfaces from general consumable interfaces (#3595)

I wonder if there's a way to generalise item consuming beyond just eating/drinking. Stuff like lava bucket in a furnace needs the same kind of "leftover" logic.

src/block/Cake.php

@@ -25,8 +25,8 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\BlockDataSerializer;
 use pocketmine\entity\effect\EffectInstance;
+use pocketmine\entity\FoodSource;
 use pocketmine\entity\Living;
-use pocketmine\item\FoodSource;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;