refactor: replace custom CRM with Monica fork

app/Helpers/MailHelper.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Helpers;
+
+use App\Models\User\User;
+use App\Interfaces\MailNotification;
+
+class MailHelper
+{
+    /**
+     * Get the HTML view that is rendered by the default markdown Laravel
+     * notification class.
+     * Yes, this is weird, but it's the only way to do it (as of Laravel 5.7).
+     *
+     * @param  MailNotification  $notification
+     * @param  User  $user
+     * @return string
+     */
+    public static function emailView($notification, $user)
+    {
+        $message = $notification->toMail($user);
+        $markdown = new \Illuminate\Mail\Markdown(view(), config('mail.markdown'));
+
+        return $markdown->render($message->markdown, $message->toArray());
+    }
+}