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/polyfill-php72/README.md

@@ -0,0 +1,35 @@
+Symfony Polyfill / Php72
+========================
+
+This component provides functions added to PHP 7.2 core:
+
+- [`spl_object_id`](https://php.net/spl_object_id)
+- [`stream_isatty`](https://php.net/stream_isatty)
+
+And also functions added to PHP 7.2 mbstring:
+
+- [`mb_ord`](https://php.net/mb_ord)
+- [`mb_chr`](https://php.net/mb_chr)
+- [`mb_scrub`](https://php.net/mb_scrub)
+
+On Windows only:
+
+- [`sapi_windows_vt100_support`](https://php.net/sapi_windows_vt100_support)
+
+Moved to core since 7.2 (was in the optional XML extension earlier):
+
+- [`utf8_encode`](https://php.net/utf8_encode)
+- [`utf8_decode`](https://php.net/utf8_decode)
+
+Also, it provides constants added to PHP 7.2:
+
+- [`PHP_FLOAT_*`](https://php.net/reserved.constants#constant.php-float-dig)
+- [`PHP_OS_FAMILY`](https://php.net/reserved.constants#constant.php-os-family)
+
+More information can be found in the
+[main Polyfill README](https://github.com/symfony/polyfill/blob/main/README.md).
+
+License
+=======
+
+This library is released under the [MIT license](LICENSE).