Add NewsOverlay to the game

osu.Game/Overlays/Toolbar/ToolbarNewsButton.cs

@@ -0,0 +1,22 @@
+// 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.Sprites;
+
+namespace osu.Game.Overlays.Toolbar
+{
+    public class ToolbarNewsButton : ToolbarOverlayToggleButton
+    {
+        public ToolbarNewsButton()
+        {
+            Icon = FontAwesome.Solid.Newspaper;
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(NewsOverlay news)
+        {
+            StateContainer = news;
+        }
+    }
+}