DOC: Separate out examples - pandas.str.is methods
- [x] closes #59806
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).

Hi @rhshadrach, I have refactored the docstrings to separate the `Examples` and `See Also` sections for each `ismethod`, no code changes were made and tested the changes locally. However, I noticed that the unit tests are now failing, which seems to be related to an issue with the CI script. Could you kindly review the changes and provide your feedback when possible? Thank you.

 /preview Website preview of this PR available at: https://pandas.pydata.org/preview/pandas-dev/pandas/59850/ Thanks @saldanhad!