gh-132930: Implement PEP 773 (GH-132931)

This change to the core CPython repo:
* Adds PyManager support to PC/layout
* Adds a warning message to the legacy py.exe if subcommands are invoked
* Add deprecation message to traditional installer
* Updates using/windows docs

Steve Dower committed 11mo ago

e20ca6d1b006674be23d16083f273e8a7b8f77b6

Parent: 11f457c

Committed by GitHub <noreply@github.com> on 4/28/2025, 12:57:47 PM