Adds some tests for the salvage helper

src/main/java/net/knarcraft/blacksmith/util/ItemHelper.java

@@ -17,6 +17,16 @@ public final class ItemHelper {
 
     }
 
+    /**
+     * Gets whether the given item is repairable
+     *
+     * @param item <p>The item to check</p>
+     * @return <p>True if the item is repairable</p>
+     */
+    public static boolean isRepairable(ItemStack item) {
+        return item.getItemMeta() instanceof Damageable && EnchantmentTarget.BREAKABLE.includes(item);
+    }
+
     /**
      * Gets the max durability of an item
      *