Add module to Drupal.org

[DieterHolvoet]

Summary

• Take the code from this module and use it to create a D8/9/10 compatible version of https://www.drupal.org/project/google_recaptcha

or

• Consider deprecating this module in favour of https://www.drupal.org/project/simple_recaptcha

or

• Create the Drupal project (example)
• Change the license to GPLv2 to comply with Drupal.org requirements (example)
• Update the composer install command in the README
• Add contributing section to the README (example)