Document verified rune natural attack layout

Field layout of rune_naturalattacks confirmed in the client (IDA): it is
the same attack info struct as a weapon, so [0] is WEPSPEED.

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

src/engine/objects/ItemTemplate.java

@@ -138,9 +138,10 @@ public class ItemTemplate {
     public final EnumSet<mbEnums.MobBehaviourType> rune_group_role_set = EnumSet.noneOf(mbEnums.MobBehaviourType.class);
     public boolean rune_renderable = false;
     public int rune_natural_power_attack;
-    // [AI] One float[] per rune_naturalattacks entry. Layout inferred from game data, not yet verified in IDA:
-    // [0] attack speed (x100 ms), [1] range, [2] ?, [3] hand (1 = right, 2 = left), [4] weapon/ammo template id,
-    // [5] projectile speed?, [6] swing anim, [7] damage type index, [8] min damage, [9] max damage
+    // [AI] One float[] per rune_naturalattacks entry. Same "attack info" struct as a weapon (verified in IDA, see
+    // MBDATA/docs/client-map.md): [0] attack speed (WEPSPEED), [1] range (MAXRANGE), [2] unknown int,
+    // [3] equip slot (1 = RHELD, 2 = LHELD), [4] projectile template id, [5] projectile speed, [6] swing anim,
+    // [7] damage type, [8] min damage, [9] max damage
     public final ArrayList<float[]> rune_natural_attacks = new ArrayList<>();
     public final HashMap<String, String> rune_sparse_data = new HashMap<>();
     public final HashMap<String, int[]> rune_skill_adj = new HashMap<>();