ACP-4499: Add a new plugin for post-install setup (#5)

src/Spryker/Zed/AppKernelExtension/Dependency/Plugin/PostInstallTaskPluginInterface.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Spryker\Zed\AppKernelExtension\Dependency\Plugin;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Introduced to run post install tasks.
+ * Despite the name, this plugin is not intended to be executed in Spryker post-deploy hook `SPRYKER_HOOK_AFTER_DEPLOY` as it is not executed in the context of the application.
+ */
+interface PostInstallTaskPluginInterface
+{
+    /**
+     * Specification:
+     * - Runs task that should be executed after deployment.
+     *
+     * @api
+     *
+     * @param \Symfony\Component\Console\Input\InputInterface $input
+     * @param \Symfony\Component\Console\Output\OutputInterface $output
+     *
+     * @return void
+     */
+    public function run(InputInterface $input, OutputInterface $output): void;
+}