Uses alr publish to open a PR for the commit from which it is run at the
Alire community index. alr will be installed if not already available, but
not cleaned up afterwards.
After the PR tests run successfully, the action will create a release in the repository. Optionally, only a regular git tag (or nothing) can be created instead.
See action.yml for available options.
Requires a secret, which should be a personal access token with repo
scope. This is used to create the pull request in the index repository. The name
of the secret is given as an input to the action. (Note, there are no
user-level secrets, so you have to add one for each repository, unless they're
part of an organization, which do have org-level secrets.)