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/config/scrapper/ScrapperNPCSettings.java

@@ -136,6 +136,7 @@ public class ScrapperNPCSettings implements TraitSettings<ScrapperSetting> {
      *
      * @return <p>The message to use for displaying salvage cost</p>
      */
+    @NotNull
     public String getCostMessage() {
         return asString(ScrapperSetting.COST_MESSAGE);
     }
@@ -310,4 +311,34 @@ public class ScrapperNPCSettings implements TraitSettings<ScrapperSetting> {
         return asString(ScrapperSetting.INSUFFICIENT_FUNDS_MESSAGE);
     }
 
+    /**
+     * Gets the message to display if an item is too damaged to produce any salvage
+     *
+     * @return <p>The no salvage message</p>
+     */
+    @NotNull
+    public String getTooDamagedMessage() {
+        return asString(ScrapperSetting.TOO_DAMAGED_FOR_SALVAGE_MESSAGE);
+    }
+
+    /**
+     * Gets the message to display when explaining that full salvage will be given for an item
+     *
+     * @return <p>The full salvage message</p>
+     */
+    @NotNull
+    public String getFullSalvageMessage() {
+        return asString(ScrapperSetting.FULL_SALVAGE_MESSAGE);
+    }
+
+    /**
+     * Gets the message to display when explaining that only partial salvage will be given for an item
+     *
+     * @return <p>The partial salvage message</p>
+     */
+    @NotNull
+    public String getPartialSalvageMessage() {
+        return asString(ScrapperSetting.PARTIAL_SALVAGE_MESSAGE);
+    }
+
 }