Adding /vendor directory to release

vendor/autoload.php

@@ -0,0 +1,25 @@
+<?php
+
+// autoload.php @generated by Composer
+
+if (PHP_VERSION_ID < 50600) {
+    if (!headers_sent()) {
+        header('HTTP/1.1 500 Internal Server Error');
+    }
+    $err = 'Composer 2.3.0 dropped support for autoloading on PHP <5.6 and you are running '.PHP_VERSION.', please upgrade PHP or use Composer 2.2 LTS via "composer self-update --2.2". Aborting.'.PHP_EOL;
+    if (!ini_get('display_errors')) {
+        if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
+            fwrite(STDERR, $err);
+        } elseif (!headers_sent()) {
+            echo $err;
+        }
+    }
+    trigger_error(
+        $err,
+        E_USER_ERROR
+    );
+}
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInit55b2ff3caf50338fcdcce1bd13abf389::getLoader();

vendor/autoload_packages.php

@@ -0,0 +1,13 @@
+<?php
+/**
+ * This file was automatically generated by automattic/jetpack-autoloader.
+ *
+ * @package automattic/jetpack-autoloader
+ */
+
+namespace Automattic\Jetpack\Autoloader\jp55b2ff3caf50338fcdcce1bd13abf389;
+
+ // phpcs:ignore
+
+require_once __DIR__ . '/jetpack-autoloader/class-autoloader.php';
+Autoloader::init();

vendor/automattic/jetpack-autoloader/.gitignore

@@ -0,0 +1 @@
+tests/php/tmp

vendor/automattic/jetpack-autoloader/.phpcs.dir.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<ruleset>
+
+	<!-- This doesn't run inside of WordPress, do we don't need to use WordPress's alternative functions. -->
+	<rule ref="WordPress.WP.AlternativeFunctions">
+		<severity>0</severity>
+	</rule>
+
+</ruleset>