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/Test/ProviderTestCase.php

@@ -0,0 +1,76 @@
+<?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\Test;
+
+use PHPUnit\Framework\TestCase;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\HttpClient\MockHttpClient;
+use Symfony\Component\Translation\Dumper\XliffFileDumper;
+use Symfony\Component\Translation\Loader\LoaderInterface;
+use Symfony\Component\Translation\Provider\ProviderInterface;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+/**
+ * A test case to ease testing a translation provider.
+ *
+ * @author Mathieu Santostefano <msantostefano@protonmail.com>
+ *
+ * @internal
+ */
+abstract class ProviderTestCase extends TestCase
+{
+    protected $client;
+    protected $logger;
+    protected string $defaultLocale;
+    protected $loader;
+    protected $xliffFileDumper;
+
+    abstract public function createProvider(HttpClientInterface $client, LoaderInterface $loader, LoggerInterface $logger, string $defaultLocale, string $endpoint): ProviderInterface;
+
+    /**
+     * @return iterable<array{0: string, 1: ProviderInterface}>
+     */
+    abstract public function toStringProvider(): iterable;
+
+    /**
+     * @dataProvider toStringProvider
+     */
+    public function testToString(ProviderInterface $provider, string $expected)
+    {
+        $this->assertSame($expected, (string) $provider);
+    }
+
+    protected function getClient(): MockHttpClient
+    {
+        return $this->client ??= new MockHttpClient();
+    }
+
+    protected function getLoader(): LoaderInterface
+    {
+        return $this->loader ??= $this->createMock(LoaderInterface::class);
+    }
+
+    protected function getLogger(): LoggerInterface
+    {
+        return $this->logger ??= $this->createMock(LoggerInterface::class);
+    }
+
+    protected function getDefaultLocale(): string
+    {
+        return $this->defaultLocale ??= 'en';
+    }
+
+    protected function getXliffFileDumper(): XliffFileDumper
+    {
+        return $this->xliffFileDumper ??= $this->createMock(XliffFileDumper::class);
+    }
+}