The runner doesn't have write access to /usr/local/bin. Install to
$HOME/.local/bin instead and add it to GITHUB_PATH.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
The .github repo had no CI running on pull requests — PRs merged without
any validation. This adds actionlint for workflow YAML and shellcheck for
scripts in .github/scripts/, triggered on PRs to main.
Co-Authored-By: Paperclip <noreply@paperclip.ing>