LibWeb: Implement Resource Timing

Author: https://github.com/Lubrsi
Commit: 6d1f78198d
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3704
Reviewed-by: https://github.com/ADKaster ✅

Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp

@@ -4523,6 +4523,7 @@ using namespace Web::NavigationTiming;
 using namespace Web::PerformanceTimeline;
 using namespace Web::RequestIdleCallback;
 using namespace Web::ResizeObserver;
+using namespace Web::ResourceTiming;
 using namespace Web::Selection;
 using namespace Web::ServiceWorker;
 using namespace Web::StorageAPI;