Add free-threaded Python support #4262

Job	Run time
Build maturin	2m 16s
Lint	1m 12s
Check armv5te-unknown-linux-gnueabi	45s
Test Alpine Linux	2m 58s
Test (ubuntu-latest, 3.9)	1m 30s
Test Bootstrap (ubuntu-latest)	5s
Test Docker	3m 52s
Test (ubuntu-latest, 3.13)	1m 26s
Test Bootstrap (macos-14)	10s
Test downstream - ${{ matrix.downstream.repository }}	0s
Test (macos-13, 3.9)	3m 14s
Test Bootstrap (windows-latest)	17s
Test Emscripten	3m 42s
Test (macos-13, 3.13)	3m 55s
Test (macos-13, pypy3.10)	3m 57s
Test MSRV	1m 52s
Test (macos-14, 3.13)	1m 34s
Test (windows-latest, 3.9)	3m 40s
Test (windows-latest, 3.13)	3m 40s
Test (windows-latest, pypy3.10)	3m 38s
Test Auditwheel (manylinux_2_28)	1m 13s
Test windows cross	46s
Test Cross Compile (aarch64-unknown-linux-gnu, cp39-cp39, python3.9, ghcr.io/rust-cross/manylinux...	1m 19s
Test Cross Compile (armv7-unknown-linux-gnueabihf, cp39-cp39, python3.9, ghcr.io/rust-cross/manyl...	1m 19s
Test Cross Compile (s390x-unknown-linux-gnu, cp310-cp310, python3.10, ghcr.io/rust-cross/manylinu...	1m 20s
Test Cross Compile (aarch64-unknown-linux-gnu, pp310-pypy310_pp73, pypy3.10, ghcr.io/rust-cross/m...	1m 21s
conclusion	1s
	51m 2s

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