feat: IPendingHandler add start time

Author: emako

src/Wpf.Ui.Violeta/Controls/PendingBox/IPendingHandler.cs

@@ -8,8 +8,12 @@ public interface IPendingHandler : IDisposable
 
     public event EventHandler? Cancel;
 
+    public DateTime StartTime { get; set; }
+
     public string? Message { get; set; }
-    public bool Cancelable { get; set; }
+
+    public bool IsShowCancel { get; set; }
+
     public bool Canceled { get; }
 
     public void Show();

src/Wpf.Ui.Violeta/Controls/PendingBox/PendingHandler.cs

@@ -11,13 +11,15 @@ public class PendingHandler(PendingBoxDialog pendingBoxDialog) : IPendingHandler
 
     public event EventHandler? Cancel;
 
+    public DateTime StartTime { get; set; } = DateTime.Now;
+
     public virtual string? Message
     {
         get => Dialog.Dispatcher.Invoke(() => Dialog.Message);
         set => Dialog.Dispatcher.Invoke(() => Dialog.Message = value);
     }
 
-    public virtual bool Cancelable
+    public virtual bool IsShowCancel
     {
         get => Dialog.Dispatcher.Invoke(() => Dialog.IsShowCancel);
         set => Dialog.Dispatcher.Invoke(() => Dialog.IsShowCancel = value);