feat: refactor dialog host to accept drawer.

src/Ursa/Controls/Drawer/CustomDrawerControl.cs

@@ -1,6 +1,29 @@
+using Avalonia.Controls.Primitives;
+
 namespace Ursa.Controls;
 
 public class CustomDrawerControl: DrawerControlBase
 {
+    internal bool IsCloseButtonVisible { get; set; }
     
+    protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
+    {
+        base.OnApplyTemplate(e);
+        if (_closeButton is not null)
+        {
+            _closeButton.IsVisible = IsCloseButtonVisible;
+        }
+    }
+
+    public override void Close()
+    {
+        if (DataContext is IDialogContext context)
+        {
+            context.Close();
+        }
+        else
+        {
+            OnElementClosing(this, null);
+        }
+    }
 }