feat(mixin): add TableBaseMixin and UUIDTableBaseMixin for async CRUD operations

- Implemented TableBaseMixin providing generic CRUD methods and automatic timestamp management.
- Introduced UUIDTableBaseMixin for models using UUID as primary keys.
- Added ListResponse for standardized paginated responses.
- Created TimeFilterRequest and PaginationRequest for filtering and pagination parameters.
- Enhanced get_with_count method to return both item list and total count.
- Included validation for time filter parameters in TimeFilterRequest.
- Improved documentation and usage examples throughout the code.

models/webdav.py

@@ -4,12 +4,13 @@ from uuid import UUID
 
 from sqlmodel import Field, Relationship, UniqueConstraint, text, Column, func, DateTime
 
-from .base import TableBase
+from .base import SQLModelBase
+from .mixin import TableBaseMixin
 
 if TYPE_CHECKING:
     from .user import User
 
-class WebDAV(TableBase, table=True):
+class WebDAV(SQLModelBase, TableBaseMixin):
     """WebDAV账户模型"""
 
     __table_args__ = (UniqueConstraint("name", "user_id", name="uq_webdav_name_user"),)