Add generic CI script to include

ci.yml

+lint:
+  stage: test
+  image: registry.git.autistici.org/pipelines/images/test/golangci-lint:main
+  script:
+    # Write the code coverage report to gl-code-quality-report.json
+    # and print linting issues to stdout in the format: path/to/file:line description
+    - golangci-lint run --out-format code-climate | tee gl-code-quality-report.json | jq -r '.[] | "\(.location.path):\(.location.lines.begin) \(.description)"'
+  artifacts:
+    reports:
+      codequality: gl-code-quality-report.json
+    paths:
+      - gl-code-quality-report.json
+  allow_failure: true
+  rules:
+    - if: $CI_COMMIT_TAG == null
+