UI 자동화를 위해 바인딩 기능 구현

- 유니티 에셋 인증 오류로 meta 재생성

Packages/com.unity.inputsystem/InputSystem/Events/InputEventHandledPolicy.cs

@@ -0,0 +1,20 @@
+namespace UnityEngine.InputSystem.LowLevel
+{
+    /// <summary>
+    /// Policy defining how the Input System will react to <see cref="InputEvent"/> instances marked as
+    /// <see cref="InputEvent.handled"/> (Or marked handled via <see cref="InputEventPtr.handled"/>).
+    /// </summary>
+    internal enum InputEventHandledPolicy
+    {
+        /// <summary>
+        /// Input events will be discarded directly and not propagate for state changes.
+        /// </summary>
+        SuppressStateUpdates,
+
+        /// <summary>
+        /// Input events will be processed for state updates and input action interaction updates but interaction
+        /// event notifications will be suppressed.
+        /// </summary>
+        SuppressActionEventNotifications
+    }
+}