Add ItemType#getItemRarity (#11049)

patches/api/0254-Improve-Item-Rarity-API.patch

@@ -131,3 +131,21 @@ index ef36a696f2f926d70c5d93ce08f75fa9a749e32f..fb1d7ff51f267225ac76c29a56d67fb4
 +    }
      // Paper end
  }
+diff --git a/src/main/java/org/bukkit/inventory/ItemType.java b/src/main/java/org/bukkit/inventory/ItemType.java
+index 5dd1c084e42ee93f3a358f58ed76b0a7d36f0713..2b5a18fe7e885fa9b581c0afb299e31f3db2690c 100644
+--- a/src/main/java/org/bukkit/inventory/ItemType.java
++++ b/src/main/java/org/bukkit/inventory/ItemType.java
+@@ -2311,4 +2311,13 @@ public interface ItemType extends Keyed, Translatable, net.kyori.adventure.trans
+     @Override
+     @NotNull String getTranslationKey();
+     // Paper end - add Translatable
++
++    // Paper start - expand ItemRarity API
++    /**
++     * Returns the item rarity for the item.
++     *
++     * @return the item rarity (or null if none is set)
++     */
++    @Nullable ItemRarity getItemRarity();
++    // Paper end - expand ItemRarity API
+ }