Rewrites a lot of scrapper code to fix actual and potential bugs

src/main/java/net/knarcraft/blacksmith/container/SalvageResult.java

@@ -7,6 +7,14 @@ import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
+/**
+ * The result of an attempted salvage
+ *
+ * @param salvageMethod  <p>The salvage method used</p>
+ * @param salvage        <p>The produced salvage</p>
+ * @param salvageState   <p>The state of the salvage result</p>
+ * @param requiredAmount <p>The amount of items required for the salvage</p>
+ */
 public record SalvageResult(@NotNull SalvageMethod salvageMethod, @NotNull List<ItemStack> salvage,
-                            @NotNull SalvageState salvageState) {
+                            @NotNull SalvageState salvageState, int requiredAmount) {
 }