Copy base64 hash of content

src/AppCommon/FileTime.App.Core.Abstraction/UserCommand/CopyBase64Command.cs

@@ -0,0 +1,13 @@
+namespace FileTime.App.Core.UserCommand;
+
+public class CopyBase64Command : IIdentifiableUserCommand
+{
+    public const string CommandName = "copy_base64";
+    public static CopyBase64Command Instance { get; } = new();
+
+    private CopyBase64Command()
+    {
+    }
+
+    public string UserCommandID => CommandName;
+}