create email and emailer with tests

tests/Fakes/Email/FakeEmailer.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Tests\Fakes\Email;
+
+use FreightQuote\Email\Email;
+use FreightQuote\Email\Emailer;
+
+class FakeEmailer implements Emailer
+{
+    private int $sentEmailCount = 0;
+
+    public function getSentEmailCount(): int
+    {
+        return $this->sentEmailCount;
+    }
+
+    public function send(Email $email): bool
+    {
+        if (count($email->getRecipients()) > 0) {
+            $this->sentEmailCount++;
+
+            return true;
+        }
+
+        return false;
+    }
+}