Add review step template for one page checkout module

- Introduced a new template file 'review copy.tpl' for the order summary step in the one page checkout process.
- The template includes a loading indicator and a header for the order summary section.
- Conditional rendering based on customer registration status is implemented.

info.php

@@ -1,4 +1,5 @@
 <?
+die('a');
 include 'medoo.php';
 $mdb = new medoo( [
   'database_type' => 'mysql',