Support license-files as a list of strings in pyproject.toml

[Calvin-L]

The docs say:

The following files are always included and cannot be excluded:

• [...]
• All defined license-files

That links to PEP 639, which gives this example for license-files:

[project]
license-files = ["LICEN[CS]E*", "AUTHORS*"]

However, hatchling doesn't accept this, throwing

TypeError: Field `project.license-files` must be a table

Reading the relevant code it looks like hatchling wants license-files.globs = [...] instead, but I don't see anything in the the hatchling docs about that, and it disagrees with the PEP. I think hatchling should accept the simpler official license-files = list-of-globs format.