Documentation

or make it private, or make it private but expose a mappingproxy.
What are your preferences?

I presume that the PEP must be updated as well (see #145057).

cc @pablogsal @DinoV

Linked PRs

• gh-148587: Make sys.lazy_modules immutable #149408
• [3.15] gh-148587: Make sys.lazy_modules match PEP and keep internal lazy submodules tra… #150014
• gh-148587: Make sys.lazy_modules match PEP and keep internal lazy submodules tracking internal #150086
• gh-148587: Document sys.lazy_modules #150742
• [3.15] gh-148587: Document sys.lazy_modules (GH-150742) #150795