chore: Move setup.cfg into pyproject.toml

[Freso]

Right now, a lot of package details are split between two files which have drifted apart. This simply moves all the details from setup.cfg into pyproject.toml without any consideration for whether information needs updating or otherwise altering, putting that off for future commits/PRs.

[Freso]

https://github.com/openfoodfacts/openfoodfacts-python/pull/339 is a follow-up PR to clean up pyproject.toml after this has gone through.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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