Add batches code-samples

Author: ellnix

.code-samples.meilisearch.yaml

@@ -742,3 +742,7 @@ update_localized_attribute_settings_1: |-
   ])
 reset_localized_attribute_settings_1: |-
   client.index('INDEX_NAME').reset_localized_attributes()
+get_all_batches_1: |-
+  client.get_batches()
+get_batch_1: |-
+  client.get_batch(BATCH_UID)