HackStudio: Enable permissive mode for Config access

Displaying a GML preview in HackStudio seems to be broken at the moment,
but this change will be needed once it does work again, so might as well
make it now, while I'm aware of the issue.

Userland/DevTools/HackStudio/main.cpp

@@ -43,6 +43,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
 
     auto app = TRY(GUI::Application::create(arguments));
     app->set_config_domain("HackStudio"_string);
+    Config::enable_permissive_mode();
     Config::pledge_domains({ "HackStudio", "Terminal", "FileManager" });
 
     auto window = GUI::Window::construct();