gh-138700: Add :sorted: option to automatically sort glossary

[corteisjr]

This PR adds the :sorted: option to Doc/glossary.rst.

Benefits:

• Ensures glossary entries are always alphabetically ordered.
• Uses locale-specific ordering, improving translations.
• Prevents manual ordering mistakes.

Collateral effects:

• "..." now appears before ">>>"
• Dunder entries (__future__, __slots__) appear before "a"

Discussion: https://discuss.python.org/t/glossary-alphabetically-ordering-for-all-language/101778/1

Fixesgh-138700

Issue

#138700 (comment)

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📚 Documentation preview 📚: https://cpython-previews--138708.org.readthedocs.build/

[python-cla-bot]

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[corteisjr]

I'm closing this PR because I no longer work with the account I opened the PR with.