Add Unlighthouse

With https://unlighthouse.dev we can do extensive website tests, which is really helpful during development.

changed the description

mentioned in commit unlighthouse@b168ff6e

mentioned in commit composer/plugin/docker4drupal@4b52224a

mentioned in commit composer/plugin/docker4drupal@391f0dff

mentioned in commit devops-tools/documentation@55eb8f6b

Unlighthouse is now available in all local projects and can be started with ahoy unlighthouse on. The report will then be available under https://unlighthouse-project.url for review.

closed