Now we have Wordpress and Laravel in the list of Code Style rules, will be good to add Drupal and Drupal Practice there too, because it's pretty popular too! The general description is here https://www.drupal.org/docs/develop/standards
and here are rule sets:
https://git.drupalcode.org/project/coder/-/blob/8.3.x/coder_sniffer/Drupal/ruleset.xml
https://git.drupalcode.org/project/coder/-/blob/8.3.x/coder_sniffer/DrupalPractice/ruleset.xml
Or, if it already possible to add manually, please describe how.