LibWeb: Add stub for IDBFactory

Author: https://github.com/shannonbooth
Commit: 8d5665ebe1
Pull-request: https://github.com/SerenityOS/serenity/pull/24377
Reviewed-by: https://github.com/tcl3

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

@@ -3764,6 +3764,7 @@ static void generate_using_namespace_definitions(SourceGenerator& generator)
     using namespace Web::Geometry;
     using namespace Web::HighResolutionTime;
     using namespace Web::HTML;
+    using namespace Web::IndexedDB;
     using namespace Web::Internals;
     using namespace Web::IntersectionObserver;
     using namespace Web::RequestIdleCallback;