remove __init__.py requirement

[krpatter-intc]

Closes #1605

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[messense]

I'm not opposed to support this, to get it merged we need to add a test case.

[krpatter-intc]

I'm not opposed to support this, to get it merged we need to add a test case.

Thank you. I'll look in to the existing tests and see if there's something I can leverage.

[Marlin-Na]

+1 for this PR. For test, should we just remove the __init__.py file in the pyo3-mixed-src test example?

[krpatter-intc]

should we just remove the init.py file in the pyo3-mixed-src test example?

I couldn't quite figure out why the original tests were failing online. I went with this suggestion for now. I could create a new "pyo3-mixed-without-init" based on the "pyo3-mixed" if that is preferred.

[krpatter-intc]

I could create a new "pyo3-mixed-without-init" based on the "pyo3-mixed" if that is preferred.

I went this way and added a new pyo3_mix_implicit test with the specific use case (and the original failures seemed to have gone away after rebasing on main)

[krpatter-intc]

Sorry for the push thrash @messense, but I think this is complete. It adds a new test for implicit namespaces and updates the changelog (let me know if squashing is needed in the PR vs. doing in the merge)