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/bootstrap.php

@@ -0,0 +1,57 @@
+<?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.
+ */
+
+use Symfony\Polyfill\Php72 as p;
+
+if (\PHP_VERSION_ID >= 70200) {
+    return;
+}
+
+if (!defined('PHP_FLOAT_DIG')) {
+    define('PHP_FLOAT_DIG', 15);
+}
+if (!defined('PHP_FLOAT_EPSILON')) {
+    define('PHP_FLOAT_EPSILON', 2.2204460492503E-16);
+}
+if (!defined('PHP_FLOAT_MIN')) {
+    define('PHP_FLOAT_MIN', 2.2250738585072E-308);
+}
+if (!defined('PHP_FLOAT_MAX')) {
+    define('PHP_FLOAT_MAX', 1.7976931348623157E+308);
+}
+if (!defined('PHP_OS_FAMILY')) {
+    define('PHP_OS_FAMILY', p\Php72::php_os_family());
+}
+
+if ('\\' === \DIRECTORY_SEPARATOR && !function_exists('sapi_windows_vt100_support')) {
+    function sapi_windows_vt100_support($stream, $enable = null) { return p\Php72::sapi_windows_vt100_support($stream, $enable); }
+}
+if (!function_exists('stream_isatty')) {
+    function stream_isatty($stream) { return p\Php72::stream_isatty($stream); }
+}
+if (!function_exists('utf8_encode')) {
+    function utf8_encode($string) { return p\Php72::utf8_encode($string); }
+}
+if (!function_exists('utf8_decode')) {
+    function utf8_decode($string) { return p\Php72::utf8_decode($string); }
+}
+if (!function_exists('spl_object_id')) {
+    function spl_object_id($object) { return p\Php72::spl_object_id($object); }
+}
+if (!function_exists('mb_ord')) {
+    function mb_ord($string, $encoding = null) { return p\Php72::mb_ord($string, $encoding); }
+}
+if (!function_exists('mb_chr')) {
+    function mb_chr($codepoint, $encoding = null) { return p\Php72::mb_chr($codepoint, $encoding); }
+}
+if (!function_exists('mb_scrub')) {
+    function mb_scrub($string, $encoding = null) { $encoding = null === $encoding ? mb_internal_encoding() : $encoding; return mb_convert_encoding($string, $encoding, $encoding); }
+}