feat(project): move edge_inference_service contents to root and update paths

- Moved all project files and directories (config, core, models, etc.) from
  edge_inference_service/ to the repository root ai_edge/
- Updated model path in config/settings.py to reflect new structure
- Revised usage paths in __init__.py documentation

utils/__init__.py

@@ -0,0 +1,3 @@
+"""
+工具类模块初始化
+"""