Module silently requires the "Contact" module to be enabled

Problem/Motivation

We don't use the Contact module on our site, and this module seems to require the contact_form entity to exist.

The result is things will fail with this error:

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "contact_form" entity type does not exist. in Drupal\Core\Entity\EntityTypeManager->getDefinition() (line 139 of /opt/drupal/web/core/lib/Drupal/Core/Entity/EntityTypeManager.php).

Steps to reproduce

Install this module on a site without the Contact module enabled.

Proposed resolution

The module should either explicitly require the Contact module (less good), or only enable certain functionality when the Contact module is enabled (perhaps split that stuff into a sub-module).