Add event publishing for inventory and combat interactions

GameCore/Player/EquipmentSystem.cs

@@ -38,5 +38,7 @@ public class EquipmentSystem : ISystem
         weaponComponent.OnFireEffects = newData.OnFireEffects;
         weaponComponent.OnHitEffects = newData.OnHitEffects;
         weaponComponent.CooldownTimer = 0f;
+
+        _world.PublishEvent(new WeaponEquippedEvent(e.Owner, e.NewWeaponItemId));
     }
 }