Command refactor

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

@@ -0,0 +1,9 @@
+using FileTime.App.Core.UserCommand;
+
+namespace FileTime.App.Core.Services;
+
+public interface IUserCommandHandler
+{
+    bool CanHandleCommand(IUserCommand command);
+    Task HandleCommandAsync(IUserCommand command);
+}