gh-84116: Docs: Document help and aliases for argparse.add_parser()

[Krishna-web-hub]

gh-84116: Doc: update the argparse documentation to clearly define the help and aliases parameters for add_parser() and added the required news file for this change.

Doc/library/argparse.rst

Replaced the vague, single-sentence description of _SubParsersAction.add_parser with a formal .. method:: directive.

This new directive explicitly lists help and aliases as parameters, along with descriptions of what they do.

Removed the old, redundant paragraphs about help (which was in parentheses) and aliases (which was a "Furthermore..." note) from later in the document. This centralizes all the information in one logical place.

Misc/NEWS.d/next/Library/...

Added the required "blurb" file to log this documentation fix.

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📚 Documentation preview 📚: https://cpython-previews--140574.org.readthedocs.build/

[StanFromIreland]

There seem to be two different things mixed in this PR, please split it.

[Krishna-web-hub]

Hi @picnixz , @savannahostrowski I have done the requested change please review it again.

[Krishna-web-hub]

@picnixz , @savannahostrowski i want to know what i will be doing for the Sub-command please enlighten me such that i can do the final changes.

[picnixz]

Keep your changes for that.

[Krishna-web-hub]

Hello @picnixz , do you want it like this or something else. Please confirm me so that i can work in that direction.

[Krishna-web-hub]

Please @picnixz , give me final instruction to fix this documentation issue

[picnixz]

Please. Delete. This. File.

[picnixz]

Please. Delete. This. File.

[picnixz]

Please @picnixz , give me final instruction to fix this documentation issue

Next time, please be patient. I do not have enough time to review PRs especially when my feedback is not properly addressed.

[Krishna-web-hub]

Thanks @picnixz , for your effort for correcting me, for the mistake i am making. And i am very sorry for being impatient. I will keep it in my mind. And i was just being confused as it is sort of new for me, but i never want to disrespect you.