(flac) Migrate package

[pauby]

The flac package needs a new maintainer. Need to migrate this over and add the latest version.

[github-actions]

Thanks for raising this issue!

The packages within this repository are maintained in my spare time. My spare time, like yours is important. Please help me not to waste it.

To help me, and to have the issue resolved more quickly, please see CONTRIBUTING for how to raise a pull request to resolve the issue yourself.

Thank you.