feat: animation.

src/Ursa/Controls/Toast/Toast.cs

@@ -35,7 +35,8 @@ public class Toast : IToast, INotifyPropertyChanged
     {
         Content = content;
         Type = type;
-        Expiration = expiration ?? TimeSpan.FromSeconds(5);
+        Expiration = expiration ?? TimeSpan.FromSeconds(3);
+        ShowClose = showClose;
         OnClick = onClick;
         OnClose = onClose;
     }

src/Ursa/Controls/Toast/WindowToastManager.cs

@@ -146,7 +146,7 @@ public class WindowToastManager : TemplatedControl, IManagedToastManager
             return;
         }
 
-        await Task.Delay(expiration ?? TimeSpan.FromSeconds(5));
+        await Task.Delay(expiration ?? TimeSpan.FromSeconds(3));
 
         toastControl.Close();
     }