Add X13 WebP module for image conversion to next-generation formats

- Implemented the main module class with essential properties and methods.
- Added translation support for various user interface strings.
- Created XML configuration file for module versioning.
- Ensured compatibility with different PHP versions and PrestaShop versions.

modules/x13webp/vendor/rosell-dk/exec-with-fallback/test.php

@@ -0,0 +1,9 @@
+<?php
+include 'vendor/autoload.php';
+//include 'src/ExecWithFallback.php';
+use ExecWithFallback\ExecWithFallback;
+use ExecWithFallback\Tests\ExecWithFallbackTest;
+
+ExecWithFallback::exec('echo hello');
+
+ExecWithFallbackTest::testExec();