Add iOS mouse settings

Functionality is currently limited to some OsuSettings, but will expand in
the future when high precision mouse is added.

osu.iOS/IOSMouseSettings.cs

@@ -0,0 +1,36 @@
+// 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.Localisation;
+using osu.Game.Configuration;
+using osu.Game.Localisation;
+using osu.Game.Overlays.Settings;
+
+namespace osu.iOS
+{
+    public class IOSMouseSettings : SettingsSubsection
+    {
+        protected override LocalisableString Header => MouseSettingsStrings.Mouse;
+
+        [BackgroundDependencyLoader]
+        private void load(OsuConfigManager osuConfig)
+        {
+            Children = new Drawable[]
+            {
+                new SettingsCheckbox
+                {
+                    LabelText = MouseSettingsStrings.DisableMouseWheelVolumeAdjust,
+                    TooltipText = MouseSettingsStrings.DisableMouseWheelVolumeAdjustTooltip,
+                    Current = osuConfig.GetBindable<bool>(OsuSetting.MouseDisableWheel),
+                },
+                new SettingsCheckbox
+                {
+                    LabelText = MouseSettingsStrings.DisableMouseButtons,
+                    Current = osuConfig.GetBindable<bool>(OsuSetting.MouseDisableButtons),
+                },
+            };
+        }
+    }
+}

osu.iOS/OsuGameIOS.cs

@@ -3,7 +3,10 @@
 
 using System;
 using Foundation;
+using osu.Framework.Input.Handlers;
+using osu.Framework.iOS.Input;
 using osu.Game;
+using osu.Game.Overlays.Settings;
 using osu.Game.Updater;
 using osu.Game.Utils;
 using Xamarin.Essentials;
@@ -18,6 +21,18 @@ namespace osu.iOS
 
         protected override BatteryInfo CreateBatteryInfo() => new IOSBatteryInfo();
 
+        public override SettingsSubsection CreateSettingsSubsectionFor(InputHandler handler)
+        {
+            switch (handler)
+            {
+                case IOSMouseHandler _:
+                    return new IOSMouseSettings();
+
+                default:
+                    return base.CreateSettingsSubsectionFor(handler);
+            }
+        }
+
         private class IOSBatteryInfo : BatteryInfo
         {
             public override double ChargeLevel => Battery.ChargeLevel;

osu.iOS/osu.iOS.csproj

@@ -23,6 +23,7 @@
   <ItemGroup>
     <Compile Include="Application.cs" />
     <Compile Include="AppDelegate.cs" />
+    <Compile Include="IOSMouseSettings.cs" />
     <Compile Include="OsuGameIOS.cs" />
   </ItemGroup>
   <ItemGroup>