### What problem does this PR solve?
Fix: Enhanced user management functionality and cascading data deletion.
Added tenant and related data initialization functionality during user
creation, including tenants, user-tenant relationships, LLM
configuration, and root folder.
Added cascading deletion logic for user deletion, ensuring that all
associated data is cleaned up simultaneously when a user is deleted.
Implemented a Werkzeug-compatible password hash algorithm (scrypt) and
verification functionality.
Added multiple DAO methods to support batch data operations and
cascading deletion.
Improved user login processing and added token signing functionality.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Feat: Implement user creation, deletion, and permission management
functionality.
- Added the `ListByEmail` method to `user.go` to query users by email
address.
- Updated the user activation status handling logic in `handler.go`,
adding input validation.
- Added RSA password decryption functionality to `password.go`.
- Implemented complete user management functionality in `service.go`,
including user creation, deletion, password modification, activation
status, and permission management.
- Added input validation and error handling logic.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat(admin): Implemented default administrator initialization and login
functionality.
Added support for default administrator configuration, including super
user nickname, email, and password.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
