Improves messages when trying to salvage an item

Implements unimplemented too damaged for salvage message
Adds two new messages explaining whether an item will produce full or partial salvage

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

@@ -1,5 +1,6 @@
 package net.knarcraft.blacksmith.util;
 
+import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.Server;
 import org.bukkit.enchantments.Enchantment;
@@ -24,6 +25,23 @@ public final class SalvageHelper {
 
     private static final Random random = new Random();
 
+    /**
+     * Gets whether the given item has a valid crafting recipe
+     *
+     * @param item <p>The item to check</p>
+     * @return <p>True if the item has a valid crafting recipe</p>
+     */
+    public static boolean hasRecipe(@NotNull ItemStack item) {
+        List<Recipe> recipes = Bukkit.getRecipesFor(new ItemStack(item.getType(), item.getAmount()));
+        for (Recipe recipe : recipes) {
+            if (recipe instanceof ShapedRecipe || recipe instanceof ShapelessRecipe) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Gets the sum of all enchantment levels for the given item
      *