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/translation/Loader/YamlFileLoader.php

@@ -0,0 +1,54 @@
+<?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\Translation\Loader;
+
+use Symfony\Component\Translation\Exception\InvalidResourceException;
+use Symfony\Component\Translation\Exception\LogicException;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Parser as YamlParser;
+use Symfony\Component\Yaml\Yaml;
+
+/**
+ * YamlFileLoader loads translations from Yaml files.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class YamlFileLoader extends FileLoader
+{
+    private $yamlParser;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function loadResource(string $resource): array
+    {
+        if (null === $this->yamlParser) {
+            if (!class_exists(\Symfony\Component\Yaml\Parser::class)) {
+                throw new LogicException('Loading translations from the YAML format requires the Symfony Yaml component.');
+            }
+
+            $this->yamlParser = new YamlParser();
+        }
+
+        try {
+            $messages = $this->yamlParser->parseFile($resource, Yaml::PARSE_CONSTANT);
+        } catch (ParseException $e) {
+            throw new InvalidResourceException(sprintf('The file "%s" does not contain valid YAML: ', $resource).$e->getMessage(), 0, $e);
+        }
+
+        if (null !== $messages && !\is_array($messages)) {
+            throw new InvalidResourceException(sprintf('Unable to load file "%s".', $resource));
+        }
+
+        return $messages ?: [];
+    }
+}