Clear manager in the loop

Calling $manager->clear() in the import loop to avoid memory problems.

Author: johndodev

src/Command/MeilisearchImportCommand.php

@@ -141,6 +141,8 @@ protected function execute(InputInterface $input, OutputInterface $output): int
                     );
                 }
 
+                $manager->clear();
+
                 ++$page;
             } while (\count($entities) >= $batchSize);