fix: make linter happy and add license-files

[wolfv]

Not sure if this helps the version sdist situation.

[baszalmstra]

I dont like this behavior at all, apparently if there is a LICENSE file the sdist will not include it but will reference it ..

Although I think this method of yours works, it makes the licensing of the project slightly more complicated because now someone has to parse the file instead of being able to refering to an SPDX. Let me try something today.

[baszalmstra]

If I read PEP 639 correctly we should just be able to use just

license = "BSD-3-Clause"

But this part of the maturin codebase ALWAYS adds the LICENSE.

I think the easiest step for now, is just to remove the LICENSE file on build to not trigger this behavior??

[wolfv]

I copied the code from Ruff. But feel free to change things around :)

[baszalmstra]

So, my solution is to simply remove the LICENSE file. It serves no purpose since there is one at the repository's root.

[wolfv]

Should we try?