Refactor app container to modularity.

lib/packages/Inpsyde/Modularity/Module/FactoryModule.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace WooCommerce\PayPalCommerce\Vendor\Inpsyde\Modularity\Module;
+
+interface FactoryModule extends Module
+{
+    /**
+     * Return application factories.
+     *
+     * Similar to `services`, but object created by given factories are not "cached", but a *new*
+     * instance is returned everytime `get()` is called in the container.
+     *
+     * @return array<string, callable(\WooCommerce\PayPalCommerce\Vendor\Psr\Container\ContainerInterface $container):mixed>
+     */
+    public function factories(): array;
+}