Publish Pyodide wheels to PyPI (PEP 783)#305
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cibuildwheel >= 4.0 tags Pyodide wheels with the PEP 783 pyemscripten_* platform that PyPI accepts (3.x emitted pyodide_2024_0, which it rejects), so stop diverting the wheel to the GitHub release and publish it to PyPI with the native wheels. Closes #304
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PyPI now accepts pyemscripten_* wheels (PEP 783), so we no longer need to divert the Pyodide wheel to the GitHub release.
Pinning the build-pyodide job to cibuildwheel >= 4.0 switches the tag from pyodide_2024_0 (rejected by PyPI) to pyemscripten_2025_0 (accepted), and the deploy job then publishes it to PyPI alongside the native wheels.
Closes #304