Add composer.json

You might want to include the dependency on https://www.drupal.org/project/sitewide_alert → and add the module.info file as part of this.

Do you think I should close this MR ✨ Add info.yml file Active and combine the work into one?

I wouldn't close it, just add a commit to it.

I merge MR1 so this should be clear to add the dependencies to the composer json and move on.

Ok, that makes sense. I just added that requirement in the composer.json.

Looks good, and merged.