SRP OutlineBehaviour not work cause Camera.onPreRender is depreceted in SRP

[mitay-walle]

here is my simple realization of Behaviour, that adds to OutlineLayerCollection to specific level.

Odin Inspector is used, but you can get the point:

` [DisallowMultipleComponent]
[ExecuteInEditMode]
public class Outline : MonoBehaviour
{
[SerializeField, Required] private OutlineLayerCollection _collection;
[field: SerializeField, OnValueChanged("OnLayerChanged"), PropertyRange(0, "MaxLayer")] private int _layer;

	[UsedImplicitly] private int MaxLayer => (int)_collection?.Count - 1;
	private void OnEnable() => AddGameObject(gameObject, _layer);
	private void OnDisable() => RemoveGameObject(gameObject);

	public void SetLayer(int layer) => OnLayerChanged(layer);

	private void OnLayerChanged(int layer)
	{
		_layer = layer;
		if (!isActiveAndEnabled)
			return;
		OnDisable();
		OnEnable();
	}

	/// <summary>
	/// Adds the <see cref="GameObject"/> passed to the specified outline layer. Creates the layer if needed.
	/// </summary>
	/// <param name="go">The <see cref="GameObject"/> to add and render outline for.</param>
	/// <seealso cref="AddGameObject(GameObject)"/>
	private void AddGameObject(GameObject go, int layerIndex)
	{
		if (layerIndex < 0)
		{
			throw new ArgumentOutOfRangeException("layerIndex");
		}

		_collection[layerIndex].Add(go);
	}

	/// <summary>
	/// Removes the specified <see cref="GameObject"/> from <see cref="OutlineLayers"/>.
	/// </summary>
	/// <param name="go">A <see cref="GameObject"/> to remove.</param>
	public void RemoveGameObject(GameObject go)
	{
		if (_collection)
		{
			_collection.Remove(go);
		}
	}
}`