[docs] [issue21150] Add quick links table to argparse docs

[Raymond Hettinger]

Raymond Hettinger added the comment:

Gaurav, overall this looks nice.  

I would drop the example column because it will make the row too wide for viewing.  Alternatively, put the examples in a separate table (as was done for the combinatoric functions in the itertools docs: https://docs.python.org/3/library/itertools.html#module-itertools ).

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