Check php linter

Investigate how we use CI and check private php libraries and/or drupal modules.

.gitlab-ci.yml

@@ -33,8 +33,8 @@ php-compatibility-83:
       --extensions=php
       --runtime-set testVersion ${PHPVERSION} .
 
-drupal-code-standard:
-  stage: test
+'🧹 PHP Coding standards (PHPCS)':
+  stage: 🪄 Lint
   image: registry.gitlab.com/pipeline-components/php-codesniffer:latest
   script:
     - cd /app