GitHub Action workflows should not be included when using the repository template

[caendesilva]

Issue description

Issue to track a bug in GitHub, where it's not possible to exclude files from repository templates. See https://github.com/orgs/community/discussions/22183

In this template, we run tests on the project, but the workflow shouldn't be present in the release when users create a repo based on the template. I don't want to use up their action minutes for something that they don't need. Considering forks don't even run workflows by default, why would repo templates be different?

[caendesilva]

One possible fix is to add another workflow

# filepath .github/workflows/first-time-setup.yml

name: first-time-setup
run-name: first time setup of repo

on:
  # run when branch created (repo generated from template)
  create:

# only keep latest run of this workflow
concurrency:
  group: first-time-setup
  cancel-in-progress: true

permissions: 
  actions: write
  checks: write
  contents: write
  
jobs:
  first-time-setup:
    # ensure run only once, when repo generated
    if: github.run_number == 1
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Remove unneeded files
        run: rm -rf .github/workflows
        
      - name: Commit changed files
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          commit_message: "Setup repo"

This does this:

But it doesn't feel right. Maybe a better solution is to just not run the workflow outside the repo.

[caendesilva]

Reopening as I realized not only workflows are affected by this, the licence files among others are also added. We don't want to accidentally licence someones proprietary app as MIT.