* Compatible with the situation where the mask is empty in CreateEditImage.
* Fix the test for the unnecessary removal of the mask.png file.
* add image variation implementation
* fix image variation bugs
* fix ci-lint problem with max line character limit
* add offitial doc link
* just for codeball test
* fix lint problem
* add optional params for audio api, e.g. prompt
* add comment for new args in translation
