feat: add two tone icon.

demo/Ursa.Demo/Models/MenuKeys.cs

@@ -21,5 +21,6 @@ public static class MenuKeys
     public const string MenuKeyRangeSlider = "RangeSlider";
     public const string MenuKeyTagInput = "TagInput";
     public const string MenuKeyTimeline = "Timeline";
+    public const string MenuKeyTwoTonePathIcon = "TwoTonePathIcon";
 
 }

demo/Ursa.Demo/Pages/TwoTonePathIconDemo.axaml

@@ -0,0 +1,18 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:u="https://irihi.tech/ursa"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="Ursa.Demo.Pages.TwoTonePathIconDemo">
+    <StackPanel>
+        <TextBlock Text="Size"></TextBlock>
+        <Slider Name="width" Minimum="0" Maximum="100" Value="20" Width="300"></Slider>
+        <ToggleSwitch Name="active" Content="Active"></ToggleSwitch>
+        <u:TwoTonePathIcon
+            IsActive="{Binding ElementName=active, Path=IsChecked}"
+            Width="{Binding #width.Value}"
+            Height="{Binding #width.Value}"
+            Data="M12 3L2 12H5V20H19V12H22L12 3M13 18H11V16H13V18M13 14H11V8H13V14Z"/>
+    </StackPanel>
+</UserControl>

demo/Ursa.Demo/Pages/TwoTonePathIconDemo.axaml.cs

@@ -0,0 +1,13 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Ursa.Demo.Pages;
+
+public partial class TwoTonePathIconDemo : UserControl
+{
+    public TwoTonePathIconDemo()
+    {
+        InitializeComponent();
+    }
+}

demo/Ursa.Demo/ViewModels/MainViewViewModel.cs

@@ -43,6 +43,7 @@ public class MainViewViewModel : ViewModelBase
             MenuKeys.MenuKeyRangeSlider => new RangeSliderDemoViewModel(),
             MenuKeys.MenuKeyTagInput => new TagInputDemoViewModel(),
             MenuKeys.MenuKeyTimeline => new TimelineDemoViewModel(),
+            MenuKeys.MenuKeyTwoTonePathIcon => new TwoTonePathIconDemoViewModel(),
         };
     }
 }

demo/Ursa.Demo/ViewModels/MenuViewModel.cs

@@ -30,6 +30,7 @@ public class MenuViewModel: ViewModelBase
             new() { MenuHeader = "RangeSlider", Key = MenuKeys.MenuKeyRangeSlider, Status = "New"},
             new() { MenuHeader = "TagInput", Key = MenuKeys.MenuKeyTagInput },
             new() { MenuHeader = "Timeline", Key = MenuKeys.MenuKeyTimeline, Status = "Updated" },
+            new() { MenuHeader = "TwoTonePathIcon", Key = MenuKeys.MenuKeyTwoTonePathIcon, Status = "New"},
         };
     }
 }

demo/Ursa.Demo/ViewModels/TwoTonePathIconDemoViewModel.cs

@@ -0,0 +1,8 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace Ursa.Demo.ViewModels;
+
+public class TwoTonePathIconDemoViewModel:ObservableObject
+{
+    
+}