增加A2WToolBox工具集，增加Launch场景核LaunchPanel

Assets/A2WToolBox/3rd/UniTask/Runtime/CancellationTokenEqualityComparer.cs

@@ -0,0 +1,23 @@
+#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
+
+using System.Collections.Generic;
+using System.Threading;
+
+namespace Cysharp.Threading.Tasks
+{
+    public class CancellationTokenEqualityComparer : IEqualityComparer<CancellationToken>
+    {
+        public static readonly IEqualityComparer<CancellationToken> Default = new CancellationTokenEqualityComparer();
+
+        public bool Equals(CancellationToken x, CancellationToken y)
+        {
+            return x.Equals(y);
+        }
+
+        public int GetHashCode(CancellationToken obj)
+        {
+            return obj.GetHashCode();
+        }
+    }
+}
+