Move piece files in Osu ruleset

osu.Game.Rulesets.Osu/Skinning/Default/GlowPiece.cs

@@ -0,0 +1,34 @@
+// 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.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.Textures;
+
+namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
+{
+    public class GlowPiece : Container
+    {
+        public GlowPiece()
+        {
+            Anchor = Anchor.Centre;
+            Origin = Anchor.Centre;
+            RelativeSizeAxes = Axes.Both;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(TextureStore textures)
+        {
+            Child = new Sprite
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Texture = textures.Get("Gameplay/osu/ring-glow"),
+                Blending = BlendingParameters.Additive,
+                Alpha = 0.5f
+            };
+        }
+    }
+}