chore: license checker - Githubissues

Makes a license checker available locally and as a CI job.

Checklist

[x] I have read the contributing guidelines and signed the CLA.
[x] I have referenced an issue containing the design document if my change introduces a new feature.
[x] I have read the security policy.
[x] I confirm that this pull request does not address a security vulnerability. If this pull request addresses a security vulnerability, I confirm that I got approval (please contact security@ory.sh) from the maintainers to push the changes.
[x] I have added tests that prove my fix is effective or that my feature works.
[x] I have added the necessary documentation within the code base (if appropriate).