added marked sent event

app/Events/Document/DocumentMarkedSent.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Events\Document;
+
+use App\Abstracts\Event;
+
+class DocumentMarkedSent extends Event
+{
+    public $document;
+
+    /**
+     * Create a new event instance.
+     *
+     * @param $document
+     */
+    public function __construct($document)
+    {
+        $this->document = $document;
+    }
+}