style(TrafficLane): add Odin attribute to vehiclePrefabs list

Assets/Scripts/Traffic/TrafficLane.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using Sirenix.OdinInspector;
 using UnityEngine;
 
 /// <summary>
@@ -25,6 +26,7 @@ public class TrafficLane : MonoBehaviour
 
     [Header("Vehicle Pool")]
     [Tooltip("Prefabs to randomly draw from when spawning. Can contain different vehicle types.")]
+    [ListDrawerSettings(ShowFoldout = false)]
     public GameObject[] vehiclePrefabs;
 
     [Tooltip("Total number of vehicle instances kept alive at once.")]