Add taiko hit explosion skinning support

osu.Game.Rulesets.Taiko/Skinning/LegacyHitExplosion.cs

@@ -0,0 +1,29 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+
+namespace osu.Game.Rulesets.Taiko.Skinning
+{
+    public class LegacyHitExplosion : CompositeDrawable
+    {
+        public LegacyHitExplosion(Drawable sprite)
+        {
+            InternalChild = sprite;
+
+            Anchor = Anchor.Centre;
+            Origin = Anchor.Centre;
+
+            AutoSizeAxes = Axes.Both;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            this.FadeIn(120);
+            this.ScaleTo(0.6f).Then().ScaleTo(1, 240, Easing.OutElastic);
+        }
+    }
+}