This GitHub Actions workflow duplicates functionality that is now built into GitHub itself, such that the workflow should be removed in order to help reduce maintenance costs and attack surfaces.
* Add new automerge action.
This PR adds a new GitHub Action that automatically merges in pull requests that pass checks and reviews, using the "automerge" label.
* Set automerge kind to squash.
Co-authored-by: Mathias Soeken <mathias.soeken@outlook.com>