LibWeb/IDB: Implement IDBDatabase::createObjectStore

Author: https://github.com/stelar7
Commit: 1057c88fdd
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

@@ -29,6 +29,16 @@ void Database::visit_edges(Visitor& visitor)
     visitor.visit(m_object_stores);
 }
 
+bool Database::has_object_store_named(String const& name) const
+{
+    for (auto const& object_store : m_object_stores) {
+        if (object_store->name() == name)
+            return true;
+    }
+
+    return false;
+}
+
 Vector<GC::Root<Database>> Database::for_key(StorageAPI::StorageKey const& key)
 {
     Vector<GC::Root<Database>> databases;