chore: 添加缺失的静态资源文件

添加多个前端界面所需的图片、字体、音频等静态资源文件，包括：
- 管理员后台的图标、背景图、组件图片
- 移动端页面的商品图片、用户中心图片、活动图标
- 第三方库的示例图片和字体文件
- 浏览器兼容性配置文件
- 图标字体文件（eot、ttf、woff、woff2格式）

这些资源是前端界面正常显示所必需的，之前可能因版本控制忽略或遗漏而缺失。

vendor/symfony/service-contracts/ServiceProviderInterface.php

@@ -0,0 +1,36 @@
+<?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\Contracts\Service;
+
+use Psr\Container\ContainerInterface;
+
+/**
+ * A ServiceProviderInterface exposes the identifiers and the types of services provided by a container.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ * @author Mateusz Sip <mateusz.sip@gmail.com>
+ */
+interface ServiceProviderInterface extends ContainerInterface
+{
+    /**
+     * Returns an associative array of service types keyed by the identifiers provided by the current container.
+     *
+     * Examples:
+     *
+     *  * ['logger' => 'Psr\Log\LoggerInterface'] means the object provides a service named "logger" that implements Psr\Log\LoggerInterface
+     *  * ['foo' => '?'] means the container provides service name "foo" of unspecified type
+     *  * ['bar' => '?Bar\Baz'] means the container provides a service "bar" of type Bar\Baz|null
+     *
+     * @return string[] The provided service types, keyed by service names
+     */
+    public function getProvidedServices(): array;
+}