ZoneHighlighter/project/Terkoiz.MapZoneHighlighter/Program.cs

using UnityEngine;
using Object = UnityEngine.Object;

namespace Terkoiz.MapZoneHighlighter
{
    public class Program
    {
        public static GameObject Hook;

        public static void Main(string[] args)
        {
            Hook = new GameObject();
            Hook.AddComponent<HighlightController>();
            Object.DontDestroyOnLoad(Hook);
        }
    }
}