Implement new search textbox design

osu.Game.Tests/Visual/UserInterface/TestSceneShearedSearchTextBox.cs

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+// 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 System;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Overlays;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestSceneShearedSearchTextBox : OsuTestScene
+    {
+        [Test]
+        public void TestAllColourSchemes()
+        {
+            foreach (var scheme in Enum.GetValues(typeof(OverlayColourScheme)).Cast<OverlayColourScheme>())
+                AddStep($"set {scheme} scheme", () => Child = createContent(scheme));
+        }
+
+        private Drawable createContent(OverlayColourScheme colourScheme)
+        {
+            var colourProvider = new OverlayColourProvider(colourScheme);
+
+            return new DependencyProvidingContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                CachedDependencies = new (Type, object)[]
+                {
+                    (typeof(OverlayColourProvider), colourProvider)
+                },
+                Children = new Drawable[]
+                {
+                    new ShearedSearchTextBox
+                    {
+                        Origin = Anchor.Centre,
+                        Anchor = Anchor.Centre,
+                        RelativeSizeAxes = Axes.X,
+                        Width = 0.5f
+                    }
+                }
+            };
+        }
+    }
+}