Update layers for GameObjects and add EnemyDeathBehavior class

Assets/Scripts/Weapons/MeleeAttack.cs

@@ -20,8 +20,14 @@ namespace Weapons
                 if (hit.gameObject == character.gameObject) continue;
                 
                 var damage = GetFinalDamage();
-                health.TakeDamage(damage);
+                health?.TakeDamage(damage);
             }
         }
+        
+        private void OnDrawGizmosSelected()
+        {
+            Gizmos.color = Color.red;
+            Gizmos.DrawWireSphere(transform.position, GetFinalRange());
+        }
     }
 }

Assets/Scripts/Weapons/Weapon.cs

@@ -11,7 +11,6 @@ namespace Weapons
     {
         private float timer;
         
-        [SerializeField] private float cooldown = 1f;
         [SerializeField] protected Character character;
         [OdinSerialize, InlineProperty] public WeaponStats weaponStats = new();