SwissQR: add Sprain\SwissQrBill and dependencies

htdocs/includes/symfony/intl/Data/Bundle/Reader/BundleReaderInterface.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Intl\Data\Bundle\Reader;
+
+/**
+ * Reads resource bundle files.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @internal
+ */
+interface BundleReaderInterface
+{
+    /**
+     * @return mixed returns an array or {@link \ArrayAccess} instance for
+     *               complex data, a scalar value otherwise
+     */
+    public function read(string $path, string $locale): mixed;
+}