PEP 747: Mark as Final

[hugovk]

Accepted:

• SC/PEP Delegate has formally accepted/rejected the PEP and posted to the Discussions-To thread
• Pull request title in appropriate format (PEP 123: Mark as Accepted)
• Status changed to Accepted/Rejected
• Resolution field points directly to SC/PEP Delegate official acceptance/rejected post, including the date (e.g. `01-Jan-2000 <https://discuss.python.org/t/12345/100>`__)
• Acceptance/rejection notice added, if the SC/PEP delegate had major conditions or comments
• Discussions-To, Post-History and Python-Version up to date

Final:

• Final implementation has been merged (including tests and docs)
• PEP matches the final implementation
• Any substantial changes since the accepted version approved by the SC/PEP delegate
• Pull request title in appropriate format (PEP 123: Mark as Final)
• Status changed to Final (and Python-Version is correct)
• Canonical docs/spec linked with a canonical-doc directive
  (or canonical-pypa-spec for packaging PEPs,
  or canonical-typing-spec for typing PEPs)

---

📚 Documentation preview 📚: https://pep-previews--4860.org.readthedocs.build/

[hugovk]

Actually, we can hop straight to Final :)

• Implement PEP 747: TypeForm cpython#145033
• gh-145033: Implement PEP 747 cpython#145034

Will update.

[JelleZijlstra]

We should also link the typing spec, python/typing#2183 added https://typing.python.org/en/latest/spec/type-forms.html