Add hooks to lint conda recipes and pyproject.toml files

Currently all of the non-dependency components of our package files are managed manually. This can lead to problems when some fields need to be specified in certain ways. It should be fairly trivial to implement a pre-commit hook that checks things like the license fields to ensure that they are appropriate. We could add as much complexity as we really need to handle various, although I'd probably err on the side of starting with only linting simple cases like common license typos and only adding more complex checks later if necessary.

Start by reviewing the repository's existing pre-commit hooks and the package metadata in pyproject.toml, then examine how conda recipe files are represented. Done means a hook checks the requested simple license-field cases, including common typos, for both conda recipes and pyproject.toml files, with coverage for the supported cases.