Issue #3601115: Add CI, fix coding standards, add README and kernel tests

Max Pogonowskirequested to merge
issue/bundle_classes-3601115:3601115-ci-standards-tests-readme into 1.x
  • Add .gitlab-ci.yml using the standard drupal.org contrib template.
  • Fix all phpcs (Drupal, DrupalPractice) violations.
  • BundleClassesHooks: add declare(strict_types=1), use the imported Article::class instead of a fully-qualified name + phpcs:ignore.
  • Move the @file docblock to the top of bundle_classes.module.
  • composer.json: drop "minimum-stability": "dev" and use the SPDX-valid GPL-2.0-or-later licence.
  • Add README.md following the drupal.org template.
  • Add a Kernel test covering bundle class application and getLastUpdatedDate().

#ai-assisted

Closes #3601115

Merge request reports