feat(python): parse licenses from dist-info folder

[nikpivkin]

Description

PEP-639 proposes adding the License-File field, which contains the path relative to the root of the project to the license-related file (but setuptools records the full relative path to the license). This PR adds support for new license-related fields. If a specific license is not specified in the metadata, then we can classify the license from the file that is specified in the License-File field.

Currently, the Wheel and (following its example) Setuptools projects flatten all license files into the .dist-info directory without preserving the source subdirectory hierarchy.

PEP-639 proposes several options for the location of files.

Related issues

• Close feat(python): parse licenses from dist-info folder #4821

Related PRs

• feat(python): add license fields #4722

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[DmitriyLewen]

@nikpivkin
Left some comments.
Take a look, please

[DmitriyLewen]

left comments

[DmitriyLewen]

lgtm

[liorj-orca]

looking forward to it! @knqyf263 @DmitriyLewen any update with this one?

[github-actions]

This PR is stale because it has been labeled with inactivity.