Ensure compliance with package licenses

[CBielstein]

Find a way to comply with any packages' licenses that require disclosures (e.g. GPL licenses) and document it.

Then either open an issue to follow up with the disclosures for specific packages or just do it as part of this PR as an example.

A great change for this would be to take #26 first so that all packages can be consolidated in to a single file. This would allow that file to be monitored for changes via a GitHub Action and to ensure that a corresponding disclosure file has been modified as well.