feat: add HTTPException for Shield

Author: kenjis

src/Exceptions/HTTPException.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace CodeIgniter\Shield\Exceptions;
+
+use CodeIgniter\HTTP\Exceptions\HTTPException as FrameworkHTTPException;
+
+class HTTPException extends FrameworkHTTPException implements BaseException
+{
+}