UI 자동화를 위해 바인딩 기능 구현

- 유니티 에셋 인증 오류로 meta 재생성

Packages/com.unity.inputsystem/InputSystem/Controls/InputControlLayoutChange.cs

@@ -0,0 +1,12 @@
+namespace UnityEngine.InputSystem
+{
+    /// <summary>
+    /// Enum used to identity the change type for the <see cref="InputSystem.onLayoutChange"/> event.
+    /// </summary>
+    public enum InputControlLayoutChange
+    {
+        Added,
+        Removed,
+        Replaced
+    }
+}