### 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
from abc import ABCMeta, abstractmethod
from datetime import datetime, timedelta
from inspect import signature
from typing import (
    TYPE_CHECKING,
    Any,
    Callable,
    ClassVar,
    Dict,
    FrozenSet,
    Iterable,
    List,
    Optional,
    Sequence,
    Set,
    Tuple,
    Type,
    TypeVar,
    Union,
    cast,
)
import attr
import jinja2
from dateutil.relativedelta import relativedelta
from sqlalchemy.orm import Session
from sqlalchemy.orm.exc import NoResultFound
import airflow.templates
from airflow.compat.functools import cached_property
from airflow.configuration import conf
from airflow.exceptions import AirflowException, TaskDeferred