Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/symfony/http-foundation/Session/Flash/FlashBagInterface.php

@@ -1,78 +0,0 @@
-<?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\HttpFoundation\Session\Flash;
-
-use Symfony\Component\HttpFoundation\Session\SessionBagInterface;
-
-/**
- * FlashBagInterface.
- *
- * @author Drak <drak@zikula.org>
- */
-interface FlashBagInterface extends SessionBagInterface
-{
-    /**
-     * Adds a flash message for the given type.
-     *
-     * @return void
-     */
-    public function add(string $type, mixed $message);
-
-    /**
-     * Registers one or more messages for a given type.
-     *
-     * @return void
-     */
-    public function set(string $type, string|array $messages);
-
-    /**
-     * Gets flash messages for a given type.
-     *
-     * @param string $type    Message category type
-     * @param array  $default Default value if $type does not exist
-     */
-    public function peek(string $type, array $default = []): array;
-
-    /**
-     * Gets all flash messages.
-     */
-    public function peekAll(): array;
-
-    /**
-     * Gets and clears flash from the stack.
-     *
-     * @param array $default Default value if $type does not exist
-     */
-    public function get(string $type, array $default = []): array;
-
-    /**
-     * Gets and clears flashes from the stack.
-     */
-    public function all(): array;
-
-    /**
-     * Sets all flash messages.
-     *
-     * @return void
-     */
-    public function setAll(array $messages);
-
-    /**
-     * Has flash messages for a given type?
-     */
-    public function has(string $type): bool;
-
-    /**
-     * Returns a list of all defined types.
-     */
-    public function keys(): array;
-}