feat: populate `component.authors`

Relating to the ([upcoming](https://github.com/CycloneDX/cyclonedx-python/pull/605)) 4.0.0 release:

The author field is currently missing in the resulting SBOM but could be populated from the `project.authors` field in `pyproject.toml` (although pyproject allows multiple authors).

See:

* https://cyclonedx.org/docs/1.5/json/#metadata_component_author
* https://packaging.python.org/en/latest/specifications/pyproject-toml/#authors-maintainers

Start by reviewing the project.authors definition in pyproject.toml, the generated component.authors field, and the linked pull request #1096. Confirm how multiple authors should map to the CycloneDX component author field, then verify that the resulting SBOM contains the expected author information.

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