Implemented save as dialog for Windows.

I18N Commander/UI MAUI/Platforms/MacCatalyst/Pages/LoadProject.razor.mac.cs

@@ -0,0 +1,13 @@
+#if MACCATALYST
+
+namespace UI_MAUI.Pages;
+
+public partial class LoadProject
+{
+    private Task ChooseProjectDestinationMacOS()
+    {
+        return Task.CompletedTask;
+    }
+}
+
+#endif