gh-75500: Add idlelib section to IDLE doc (GH-95832)

This enables accessing IDLE as 'idlelib' in the Doc Module listing.
(cherry picked from commit 70fc9641b56144854777aef29c145cd10789e3df)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Miss Islington (bot) committed 3y ago

c6aa68fdf57940305cb0371f1c22dfebe1497c24

Parent: 1a22ec5

Committed by GitHub <noreply@github.com> on 8/9/2022, 7:33:23 PM