CI: Add 3.13 free-threading wheels

[djhoese]

Continuation from #1512

• Closes #xxxx
• Tests added
• Fully documented, including history.rst for all changes and api/*.rst for new API

[djhoese]

@snowman2 PyPy is no longer built by default with cibuildwheel 3+. Do you still want those wheels built?

Edit: I see CIBW_SKIP: "pp*-win* pp31*" which a warning says are no longer supported. So I'm not sure what PyPy versions that leaves.

[djhoese]

Alright reading the logs it looks like 3.13t wheels are being built now @alihamdan.

[djhoese]

Regarding PyPy, cibuildwheel supports builds for PyPy with 3.8-3.11, but the selectors in CI were already dropping PyPy on Windows and all PyPy starting with 31*. Kind of feels like PyPy shouldn't be built until someone comes along and needs it again.

[snowman2]

Kind of feels like PyPy shouldn't be built until someone comes along and needs it again.

That's fine with me. Mind making an issue about pypy support and pinning it?

[djhoese]

Issue created but I can't pin it because there are already 3 pinned and github only allows 3.

[snowman2]

Issue created but I can't pin it because there are already 3 pinned and github only allows 3.

Much appreciated. I updated the pins.