Add .gitlab-ci.yml

.gitlab-ci.yml

+stages:
+  - test
+
+# Regarding severity=0 https://git.app.uib.no/it/site/w4.uib.no/-/issues/590
+php-compatibility-83:
+  stage: test
+  image: registry.gitlab.com/pipeline-components/php-codesniffer:latest
+  variables:
+    PHPVERSION: "8.3"
+  script:
+    - >-
+      phpcs -s -p --colors
+      --standard=PHPCompatibility
+      --severity=0
+      --extensions=php
+      --runtime-set testVersion ${PHPVERSION} .
+
+drupal-code-standard:
+  stage: test
+  image: registry.gitlab.com/pipeline-components/php-codesniffer:latest
+  script:
+    - cd /app
+    - composer require drupal/coder
+    - composer show -P
+    - cd /
+    - >-
+      phpcs
+      -s -p --colors
+      --standard=Drupal
+      --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml
+      --runtime-set ignore_warnings_on_exit 1
+      /builds/it/lib/drupal/modules/uib-common-ui/