FEAT: NEW WORKFLOW ENGINE (#3160)

Co-authored-by: Joel <iamjoel007@gmail.com>
Co-authored-by: Yeuoly <admin@srmxy.cn>
Co-authored-by: JzoNg <jzongcode@gmail.com>
Co-authored-by: StyleZhang <jasonapring2015@outlook.com>
Co-authored-by: jyong <jyong@dify.ai>
Co-authored-by: nite-knite <nkCoding@gmail.com>
Co-authored-by: jyong <718720800@qq.com>

api/controllers/service_api/__init__.py

@@ -7,5 +7,5 @@ api = ExternalApi(bp)
 
 
 from . import index
-from .app import app, audio, completion, conversation, file, message
+from .app import app, audio, completion, conversation, file, message, workflow
 from .dataset import dataset, document, segment