Finishes the ActionCost implementation

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

@@ -38,6 +38,8 @@ public final class TabCompleteValuesHelper {
             case MATERIAL -> getAllReforgeAbleMaterialNames();
             case ENCHANTMENT, ENCHANTMENT_LIST -> getAllEnchantments();
             case STRING_LIST -> List.of("*_SHOVEL,*_PICKAXE,*_AXE,*_HOE,*_SWORD:STICK,SMITHING_TABLE:*_PLANKS");
+            // TODO: Change this to something that makes sense
+            case ADVANCED_COST -> List.of();
         };
     }