Add new endpoint `/userMgr/list` to retrieve all users with superuser permission. Includes handler implementation, database query function, and API documentation update.
- Implement RemoveUser function in database.go to delete users
- Add RemoveUserHandler to handle HTTP requests for user removal
- Update API documentation with new /userMgr/remove endpoint
- Add route for user removal in router.go
- Add new `/userMgr/create` endpoint for superusers to create users with specified types
- Update AddUser function to accept user type parameter
- Add documentation for the new endpoint in api.md
- Remove debug log comment in auth.go
NanamiAdmin