Show icons when items are on clipbaord

src/AppCommon/FileTime.App.Core.Abstraction/Services/IClipboardService.cs

@@ -1,3 +1,4 @@
+using System.Collections.ObjectModel;
 using FileTime.Core.Command;
 using FileTime.Core.Models;
 
@@ -6,7 +7,7 @@ namespace FileTime.App.Core.Services;
 public interface IClipboardService
 {
     Type? CommandFactoryType { get; }
-    IReadOnlyList<FullName> Content { get; }
+    ReadOnlyObservableCollection<FullName> Content { get; }
 
     void AddContent(FullName absolutePath);
     void RemoveContent(FullName absolutePath);