Expose attribute sentiment (#12974)

Co-authored-by: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>

paper-api/src/main/java/org/bukkit/attribute/Attribute.java

@@ -163,6 +163,12 @@ public interface Attribute extends OldEnum<Attribute>, Keyed, Translatable, net.
         return Registry.ATTRIBUTE.getOrThrow(NamespacedKey.minecraft(key));
     }
 
+    /**
+     * {@return the sentiment of this attribute}
+     */
+    @NotNull
+    Sentiment getSentiment();
+
     /**
      * @param name of the attribute.
      * @return the attribute with the given name.
@@ -185,4 +191,17 @@ public interface Attribute extends OldEnum<Attribute>, Keyed, Translatable, net.
     static Attribute[] values() {
         return Lists.newArrayList(Registry.ATTRIBUTE).toArray(new Attribute[0]);
     }
+
+    /**
+     * An attribute sentiment describes the intent behind the attribute, meaning
+     * whether it is supposed to be a positive, neutral, or negative attribute.
+     */
+    enum Sentiment {
+        // Start generate - AttributeSentiment
+        // @GeneratedFrom 1.21.8
+        POSITIVE,
+        NEUTRAL,
+        NEGATIVE;
+        // End generate - AttributeSentiment
+    }
 }