### 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
.. code-block:: python
        cross_downstream(from_tasks=[t1, x2(), t3], to_tasks=[x1(), t2, x3()])
    is equivalent to::
        t1 ---> x1
           \ /
        x2 -X -> t2
           / \
        t3 ---> x3
    .. code-block:: python
        x1 = x1()
        x2 = x2()
        x3 = x3()
        t1.set_downstream(x1)
        t1.set_downstream(t2)
        t1.set_downstream(x3)
        x2.set_downstream(x1)
        x2.set_downstream(t2)
        x2.set_downstream(x3)
        t3.set_downstream(x1)
        t3.set_downstream(t2)
        t3.set_downstream(x3)
    :param from_tasks: List of tasks or XComArgs to start from.
    :type from_tasks: List[airflow.models.BaseOperator] or List[airflow.models.XComArg]
    :param to_tasks: List of tasks or XComArgs to set as downstream dependencies.
    :type to_tasks: List[airflow.models.BaseOperator] or List[airflow.models.XComArg]
    """
    for task in from_tasks:
        task.set_downstream(to_tasks)
@attr.s(auto_attribs=True)
class BaseOperatorLink(metaclass=ABCMeta):