fix: fix the lint check errors of the main branch (#403)

src/config/__init__.py

@@ -1,6 +1,7 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
+from .loader import load_yaml_config
 from .tools import SELECTED_SEARCH_ENGINE, SearchEngine
 from .questions import BUILT_IN_QUESTIONS, BUILT_IN_QUESTIONS_ZH_CN
 
@@ -45,4 +46,5 @@ __all__ = [
     "SearchEngine",
     "BUILT_IN_QUESTIONS",
     "BUILT_IN_QUESTIONS_ZH_CN",
+    load_yaml_config,
 ]