Introduce common/config_utils.py (#10968)

### What problem does this PR solve?

As title.

### Type of change

- [x] Refactoring

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

api/ragflow_server.py

@@ -41,7 +41,7 @@ from common.file_utils import get_project_base_directory
 from api.db.db_models import init_database_tables as init_web_db
 from api.db.init_data import init_web_data
 from api.versions import get_ragflow_version
-from api.utils.configs import show_configs
+from common.config_utils import show_configs
 from rag.settings import print_rag_settings
 from rag.utils.mcp_tool_call_conn import shutdown_all_mcp_sessions
 from rag.utils.redis_conn import RedisDistributedLock