Make all starters use pyproject.toml

[DimedS]

Motivation and Context

This PR builds upon the approach outlined in #2583. Initially, we transition from setup.py to pyproject.toml, keeping them at the same level within the '/src' folder. Concurrently, we shift from setup.cfg to the .flake8 configuration files. In the subsequent phase, with the release of Kedro 0.19, we plan to move pyproject.toml up one directory level and merge it with the existing pyproject.toml file.

How has this been tested?

Tested manually:
kedro new --starter git+https://github.com/kedro-org/kedro-starters.git --directory spaceflights --checkout 2280-make-all-starters-use-pyprojecttoml

Checklist

• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Assigned myself to the PR
• Added tests to cover my changes

[astrojuanlu]

Gave a quick first inspection, all pyproject.toml files are lacking a final newline

[DimedS]

Gave a quick first inspection, all pyproject.toml files are lacking a final newline

thanks, fixed it!

[astrojuanlu]

3.10 jobs failing because of using an old PyYAML, see yaml/pyyaml#601 (comment)

we'd either have to bump the PyYAML dependency, or constrain Cython<3 in the build phase.

[DimedS]

3.10 jobs failing because of using an old PyYAML, see yaml/pyyaml#601 (comment)

we'd either have to bump the PyYAML dependency, or constrain Cython<3 in the build phase.

@astrojuanlu, thank you for pointing that out. It indeed seems to be an issue with Python 3.10. Can you clarify who and why installed Cython in that case? Regardless, it might be a good idea to update our PyYAML requirements to match Kedro's: "PyYAML>=4.2, <7.0". Do you foresee any issues with this adjustment?

[noklam]

Looks good to me, I didn't test because CI is passing.

[astrojuanlu]

I think it's good that we move to the new PyYAML, thanks @DimedS !

[astrojuanlu]

This and kedro-org/kedro#2853 are ready to be merged 🔥