* refactoring http request creation and sending
* fix lint error
* increase the test coverage of client.go
* refactor: Change the style of HTTPRequestBuilder.Build func to one-argument-per-line.
* add form builder
* cover VariImage
* test for closing errors
* simplify tests
* add audio api test coverage
* don't leak authToken when printed
* rename api->client
* fix test
* 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
* 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
* Modify the test module, add the file upload test, and add the image editing api
* fix golangci-lint
* fix golangci-lint
* Static file deletion, file directory name modification
* fix
* test-server-related logic encapsulated in a single tidy
struct
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Co-authored-by: julian_huang <julian.huang@yuansuan.com>
