feat: add more resources.

demo/Semi.Avalonia.Demo/Pages/PaletteDemo.axaml.cs

@@ -1,5 +1,7 @@
+using System.Threading.Tasks;
 using Avalonia;
 using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
 using Avalonia.Markup.Xaml;
 using Semi.Avalonia.Demo.ViewModels;
 
@@ -10,6 +12,14 @@ public partial class PaletteDemo : UserControl
     public PaletteDemo()
     {
         InitializeComponent();
-        this.DataContext = new PaletteDemoViewModel();
+        
+    }
+
+    protected override async  void OnApplyTemplate(TemplateAppliedEventArgs e)
+    {
+        base.OnApplyTemplate(e);
+        PaletteDemoViewModel? vm = new PaletteDemoViewModel();
+        vm.InitializeResources();
+        DataContext = vm;
     }
 }