Understanding what a GitLab component is and how to use it is not clear from the repo

[davidbuzinski]

There is a link to a mirror of the repo with running pipelines. In addition the .gitlab-ci.yml is very minimal (which is good), we should give more info about how users can find the resources they need in order to properly use the component.

[davidbuzinski]

Maybe we should link to the primary documentation for each of the integrations we showcase in this repository. It seems especially relevant for the GitLab component, where the documentation is on gitlab.com rather than GitHub.