UI 자동화를 위해 바인딩 기능 구현

- 유니티 에셋 인증 오류로 meta 재생성

Packages/com.unity.inputsystem/InputSystem/Plugins/PlayerInput/PlayerNotifications.cs

@@ -0,0 +1,44 @@
+namespace UnityEngine.InputSystem
+{
+    /// <summary>
+    /// Determines how the triggering of an action or other input-related events are relayed to other GameObjects.
+    /// </summary>
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1717:Only FlagsAttribute enums should have plural names")]
+    public enum PlayerNotifications
+    {
+        ////TODO: add a "None" behavior; for actions, users may want to poll (or use the generated interfaces)
+
+        /// <summary>
+        /// Use <see cref="GameObject.SendMessage(string,object)"/> to send a message to the <see cref="GameObject"/>
+        /// that <see cref="PlayerInput"/> belongs to.
+        ///
+        /// The message name will be the name of the action (e.g. "Jump"; it will not include the action map name),
+        /// and the object will be the <see cref="PlayerInput"/> on which the action was triggered.
+        ///
+        /// If the notification is for an action that was triggered, <see cref="SendMessageOptions"/> will be
+        /// <see cref="SendMessageOptions.RequireReceiver"/> (i.e. an error will be logged if there is no corresponding
+        /// method). Otherwise it will be <see cref="SendMessageOptions.DontRequireReceiver"/>.
+        /// </summary>
+        SendMessages,
+
+        /// <summary>
+        /// Like <see cref="SendMessages"/> but instead of using <see cref="GameObject.SendMessage(string,object)"/>,
+        /// use <see cref="GameObject.BroadcastMessage(string,object)"/>.
+        /// </summary>
+        BroadcastMessages,
+
+        /// <summary>
+        /// Have a separate <a href="https://docs.unity3d.com/ScriptReference/Events.UnityEvent.html">UnityEvent</a> for each notification.
+        /// Allows wiring up target methods to invoke such that the connection is persisted in Unity serialized data.
+        ///
+        /// See <see cref="PlayerInput.actionEvents"/> and related callbacks such as <see cref="PlayerInput.controlsChangedEvent"/>.
+        /// </summary>
+        InvokeUnityEvents,
+
+        ////TODO: Kill
+        /// <summary>
+        /// Use plain C# callbacks.
+        /// </summary>
+        InvokeCSharpEvents
+    }
+}