feat: add a MalformedFeed generic exception class

Author: Harrison Ifeanyichukwu

src/Exceptions/MalformedFeedException.php

@@ -0,0 +1,16 @@
+<?php
+declare(strict_types = 1);
+
+namespace Forensic\FeedParser\Exceptions;
+
+use Exception;
+
+
+class MalformedFeedException extends Exception
+{
+    public function __construct(string $message, int $code = 0,
+        Exception $previous = null
+    ) {
+        Exception::__construct($message, $code, $previous);
+    }
+}