Update rock textures and make rock stew edible

src/main/java/com/minelittlepony/unicopia/item/UItems.java

@@ -70,7 +70,7 @@ public interface UItems {
 
     Item PEBBLES = register("pebbles", new RacePredicatedAliasedBlockItem(UBlocks.ROCKS, new Item.Settings().group(ItemGroup.MATERIALS), Race::canUseEarth));
     Item ROCK = register("rock", new Item(new Item.Settings().group(ItemGroup.MATERIALS)));
-    Item ROCK_STEW = register("rock_stew", new Item(new Item.Settings().group(ItemGroup.FOOD)));
+    Item ROCK_STEW = register("rock_stew", new Item(new Item.Settings().group(ItemGroup.FOOD).food(FoodComponents.MUSHROOM_STEW)));
 
     Item MUG = register("mug", new Item(new Settings().group(ItemGroup.MATERIALS).maxCount(16)));
     Item CIDER = register("cider", new DrinkableItem(new Item.Settings().group(ItemGroup.FOOD).food(UFoodComponents.CIDER).maxCount(1).recipeRemainder(MUG)));