Add RuneType enum and DamageType.ANTISIEGE

RuneType covers the rune_type values in the client cache data
(CLASS, DISCIPLINE, RACE, TALENT). ANTISIEGE matches the
combat_attack_resist key in the cache data.

RuneTemplate.rune_type and combat_attack_resist on both cache
templates now use these enums.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/mbEnums.java

@@ -824,6 +824,7 @@ public class mbEnums {
         ACID,
         DISEASE,
         UNKNOWN,
+        ANTISIEGE,
         // these added for immunities
         ATTACK,
         POWERS,
@@ -1509,6 +1510,15 @@ public class mbEnums {
         }
     }
 
+    // rune_type values from the client cache data (COBJECTS/RUNE)
+
+    public enum RuneType {
+        CLASS,
+        DISCIPLINE,
+        RACE,
+        TALENT
+    }
+
     public enum ShrineType {
 
         Aelfborn(1701900, -75506007, true),