feat: implement command, fix icon foreground in light mode.

demo/Ursa.Demo/Pages/BreadcrumbDemo.axaml

@@ -26,6 +26,7 @@
         <u:Breadcrumb
             DisplayMemberBinding="{Binding Section}"
             IconBinding="{Binding Icon}"
+            CommandBinding="{Binding Command}"
             ItemsSource="{Binding Items1}">
             <u:Breadcrumb.IconTemplate>
                 <DataTemplate DataType="x:String">

demo/Ursa.Demo/ViewModels/BreadcrumbDemoViewModel.cs

@@ -1,5 +1,8 @@
 using System.Collections.ObjectModel;
+using System.Windows.Input;
 using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Ursa.Controls;
 
 namespace Ursa.Demo.ViewModels;
 
@@ -24,4 +27,14 @@ public class BreadcrumbDemoItem: ObservableObject
 {
     public string Section { get; set; }
     public string Icon { get; set; }
+    
+    public ICommand Command { get; set; }
+
+    public BreadcrumbDemoItem()
+    {
+        Command = new RelayCommand(() =>
+        {
+            MessageBox.ShowOverlayAsync(Section);
+        });
+    }
 }

src/Ursa.Themes.Semi/Controls/Breadcrumb.axaml

@@ -33,7 +33,7 @@
                             VerticalAlignment="Center"
                             Content="{TemplateBinding Icon}"
                             ContentTemplate="{TemplateBinding IconTemplate}"
-                            Foreground="{TemplateBinding Foreground}"
+                            Foreground="{DynamicResource SemiColorText2}"
                             IsVisible="{TemplateBinding Icon,
                                                         Converter={x:Static ObjectConverters.IsNotNull}}" />
                         <ContentPresenter

src/Ursa/Controls/Breadcrumb/BreadcrumbItem.cs

@@ -3,6 +3,7 @@ using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Templates;
+using Avalonia.Input;
 
 namespace Ursa.Controls;
 
@@ -47,8 +48,9 @@ public class BreadcrumbItem: ContentControl
         set => SetValue(IconTemplateProperty, value);
     }
 
-    static BreadcrumbItem()
+    protected override void OnPointerPressed(PointerPressedEventArgs e)
     {
-        
+        base.OnPointerPressed(e);
+        Command?.Execute(null);
     }
 }