Added support to scan prefabs

Editor/Validators/GameObject/GameObjectValidatorObsoleteComponents.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using UnityEngine;
+using UnityEngine.Pool;
+
+namespace Module.ProjectValidator.Editor
+{
+    internal sealed class GameObjectValidatorObsoleteComponents : IGameObjectValidator
+    {
+        public void Validate(GameObject gameObject, List<ValidatorResult> results)
+        {
+            using var _ = ListPool<Component>.Get(out var list);
+            gameObject.GetComponents(list);
+
+            for (var i = 0; i < list.Count; i++)
+            {
+                var type = list[i].GetType();
+
+                if (type.GetCustomAttribute(typeof(ObsoleteAttribute)) != null)
+                    results.Add(ValidatorResult.Create(EValidatorSeverity.Warning, $"GameObject has obsolete '{type.Name}' component"));
+            }
+        }
+    }
+}