Added ReadOnlyOnPlayField Attribute.

Editor/ReadOnlyOnPlayFieldDrawer.cs

@@ -0,0 +1,18 @@
+using Runtime;
+using UnityEditor;
+using UnityEngine;
+
+namespace Utils
+{
+    [CustomPropertyDrawer(typeof(ReadOnlyOnPlayFieldAttribute))]
+    public class ReadOnlyOnPlayFieldDrawer : PropertyDrawer
+    {
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            var state = Application.isPlaying;
+            if (state) GUI.enabled = false;
+            EditorGUI.PropertyField(position, property, label, true);
+            if (state) GUI.enabled = true;
+        }
+    }
+}

Editor/ReadOnlyOnPlayFieldDrawer.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 9c45448d04584b318be7490a85ae4681
+timeCreated: 1657132838