LibWeb/IDB: Add internal ObjectStore type

Author: https://github.com/stelar7
Commit: 3c5578cc87
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4077
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/IndexedDB/Internal/Database.cpp

@@ -26,6 +26,7 @@ void Database::visit_edges(Visitor& visitor)
     Base::visit_edges(visitor);
     visitor.visit(m_associated_connections);
     visitor.visit(m_upgrade_transaction);
+    visitor.visit(m_object_stores);
 }
 
 Vector<GC::Root<Database>> Database::for_key(StorageAPI::StorageKey const& key)