Add `email_reroute` module

[AlexSkrypnyk]

Add settings.reroute_email.php:

<?php

/**
 * @file
 * Reroute email settings.
 */

declare(strict_types=1);

$config['reroute_email.settings']['enable'] = FALSE;
$config['reroute_email.settings']['address'] = 'webmaster@your-site-domain.example';
$config['reroute_email.settings']['allowed'] = '*@your-site-domain.example';
$config['reroute_email.settings']['roles'] = '';

if (!in_array($settings['environment'], [ENVIRONMENT_STAGE, ENVIRONMENT_PROD])) {
  $config['reroute_email.settings']['enable'] = TRUE;
}