### Describe the issue with documentation

`BaseOperator` type hints for `retry_delay` and `max_retry_delay` shows `timedelta` only, however the params also accept `float` seconds values.
Also, type hint for `dag` param is missing.
More precise type hints and params descriptions in the docs can help to understand the code behavior easier.

### How to solve the problem

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

airflow/models/baseoperator.py
)
        elif len(dags) == 1:
            dag = dags.popitem()[1]
        else:
            raise AirflowException(
                f"Tried to create relationships between tasks that don't have DAGs yet. "
                f"Set the DAG for at least one task and try again: {[self] + task_list}"
            )
        if dag and not self.has_dag():
            
            
            self.dag = dag
            self.dag.task_group.add(self)
        for task in task_list:
            if dag and not task.has_dag():
                
                
                task.dag = dag
                task.dag.task_group.add(task)
            if upstream:
                task.add_only_new(task.get_direct_relative_ids(upstream=False), self.task_id, self.dag.dag_id)
                self.add_only_new(self._upstream_task_ids, task.task_id, task.dag.dag_id)
                if edge_modifier:
                    edge_modifier.add_edge_info(self.dag, task.task_id, self.task_id)
            else:
                self.add_only_new(self._downstream_task_ids, task.task_id, task.dag.dag_id)
                task.add_only_new(task.get_direct_relative_ids(upstream=True), self.task_id, self.dag.dag_id)
                if edge_modifier:
                    edge_modifier.add_edge_info(self.dag, self.task_id, task.task_id)
    def set_downstream(