feat: Add Card control and card demo with album images.

src/Avalonia/HandyControlDemo_Avalonia/ViewModel/Controls/CardDemoViewModel.cs

@@ -0,0 +1,28 @@
+using CommunityToolkit.Mvvm.Input;
+using HandyControlDemo.Data;
+using HandyControlDemo.Service;
+
+namespace HandyControlDemo.ViewModel;
+
+public partial class CardDemoViewModel : DemoViewModelBase<CardModel>
+{
+    private readonly DataService _dataService;
+
+    public CardDemoViewModel(DataService dataService)
+    {
+        _dataService = dataService;
+        DataList = dataService.GetCardDataList();
+    }
+
+    [RelayCommand]
+    private void AddItem() => DataList.Insert(0, _dataService.GetCardData());
+
+    [RelayCommand]
+    private void RemoveItem()
+    {
+        if (DataList.Count > 0)
+        {
+            DataList.RemoveAt(0);
+        }
+    }
+}