Add automatic restoring Anim Event tracks when reimporting animation asset

#2363

Source/Engine/Animations/AnimationData.h

@@ -3,6 +3,7 @@
 #pragma once
 
 #include "Engine/Core/Types/String.h"
+#include "Engine/Core/Types/Pair.h"
 #include "Engine/Core/Math/Transform.h"
 #include "Engine/Animations/Curve.h"
 
@@ -68,6 +69,16 @@ public:
     uint64 GetMemoryUsage() const;
 };
 
+/// <summary>
+/// Single track with events.
+/// </summary>
+struct EventAnimationData
+{
+    float Duration = 0.0f;
+    StringAnsi TypeName;
+    StringAnsi JsonData;
+};
+
 /// <summary>
 /// Root Motion modes that can be applied by the animation. Used as flags for selective behavior.
 /// </summary>
@@ -120,10 +131,15 @@ struct AnimationData
     String RootNodeName;
 
     /// <summary>
-    /// The per skeleton node animation channels.
+    /// The per-skeleton node animation channels.
     /// </summary>
     Array<NodeAnimationData> Channels;
 
+    /// <summary>
+    /// The animation event tracks.
+    /// </summary>
+    Array<Pair<String, StepCurve<EventAnimationData>>> Events;
+
 public:
     /// <summary>
     /// Gets the length of the animation (in seconds).