Adding /vendor directory to release

vendor/autoload.php

@@ -0,0 +1,12 @@
+<?php
+
+// autoload.php @generated by Composer
+
+if (PHP_VERSION_ID < 50600) {
+    echo '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;
+    exit(1);
+}
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInit3cd9acb28f305b8aa32e8c83d0bb5a17::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\jp3cd9acb28f305b8aa32e8c83d0bb5a17;
+
+ // 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>