Add tokenmaker workflow to test and debug

[teutoburg]

Use, e.g.:

jobs:
  my-automated-commit:
    runs-on: ubuntu-latest
    name: Do something and push
    steps:
      - uses: actions/checkout@v4

      - name: Get GitHub App token
        id: auth
        uses: ./.github/workflows/authenticate-github-app.yml
        secrets:
          APP_ID: ${{ secrets.APP_ID }}
          APP_PRIVATE_KEY: ${{ secrets.APP_PRIVATE_KEY }}
          APP_INSTALLATION_ID: ${{ secrets.APP_INSTALLATION_ID }}

      - name: Make changes and commit
        run: |
          git config user.name "My GitHub App"
          git config user.email "[email protected]"
          # make your changes here
          git commit -am "Automated update"
          git push https://x-access-token:${{ steps.auth.outputs.token }}@github.com/${{ github.repository }}.git

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.84%. Comparing base (cf6f7ab) to head (c88ce24).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #70   +/-   ##
=======================================
  Coverage   97.84%   97.84%           
=======================================
  Files           6        6           
  Lines         464      464           
=======================================
  Hits          454      454           
  Misses         10       10           

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[teutoburg]

Closed in favor of AstarVienna/DevOps#65 and AstarVienna/DevOps#66.