Refactor models and routes for item management

Reorganized model structure by replacing 'object' and 'items' with a unified 'item' model using UUIDs, and moved base model logic into separate files. Updated routes to use the new item model and improved request/response handling. Enhanced user and setting models, added utility functions, and improved error handling throughout the codebase. Also added initial .idea project files and minor admin API improvements.

Co-Authored-By: 砂糖橘 <54745033+Foxerine@users.noreply.github.com>

model/__init__.py

@@ -1,4 +1,5 @@
-from . import token
-from .setting import Setting
-from .object import Object
-from .user import User
+from .response import DefaultResponse, TokenResponse, TokenData
+from .setting import Setting, SettingResponse
+from .item import Item, ItemDataResponse, ItemTypeEnum, ItemStatusEnum
+from .user import User, UserTypeEnum
+from .database import Database