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/ralouphie/getallheaders/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2014 Ralph Khattar
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/ralouphie/getallheaders/README.md

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+getallheaders
+=============
+
+PHP `getallheaders()` polyfill. Compatible with PHP >= 5.3.
+
+[![Build Status](https://travis-ci.org/ralouphie/getallheaders.svg?branch=master)](https://travis-ci.org/ralouphie/getallheaders)
+[![Coverage Status](https://coveralls.io/repos/ralouphie/getallheaders/badge.png?branch=master)](https://coveralls.io/r/ralouphie/getallheaders?branch=master)
+[![Latest Stable Version](https://poser.pugx.org/ralouphie/getallheaders/v/stable.png)](https://packagist.org/packages/ralouphie/getallheaders)
+[![Latest Unstable Version](https://poser.pugx.org/ralouphie/getallheaders/v/unstable.png)](https://packagist.org/packages/ralouphie/getallheaders)
+[![License](https://poser.pugx.org/ralouphie/getallheaders/license.png)](https://packagist.org/packages/ralouphie/getallheaders)
+
+
+This is a simple polyfill for [`getallheaders()`](http://www.php.net/manual/en/function.getallheaders.php).
+
+## Install
+
+For PHP version **`>= 5.6`**:
+
+```
+composer require ralouphie/getallheaders
+```
+
+For PHP version **`< 5.6`**:
+
+```
+composer require ralouphie/getallheaders "^2"
+```

vendor/ralouphie/getallheaders/composer.json

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+{
+	"name": "ralouphie/getallheaders",
+	"description": "A polyfill for getallheaders.",
+	"license": "MIT",
+	"authors": [
+		{
+			"name": "Ralph Khattar",
+			"email": "ralph.khattar@gmail.com"
+		}
+	],
+	"require": {
+		"php": ">=5.6"
+	},
+	"require-dev": {
+		"phpunit/phpunit": "^5 || ^6.5",
+		"php-coveralls/php-coveralls": "^2.1"
+	},
+	"autoload": {
+		"files": ["src/getallheaders.php"]
+	},
+	"autoload-dev": {
+		"psr-4": {
+			"getallheaders\\Tests\\": "tests/"
+		}
+	}
+}

vendor/ralouphie/getallheaders/src/getallheaders.php

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+<?php
+
+if (!function_exists('getallheaders')) {
+
+    /**
+     * Get all HTTP header key/values as an associative array for the current request.
+     *
+     * @return string[string] The HTTP header key/value pairs.
+     */
+    function getallheaders()
+    {
+        $headers = array();
+
+        $copy_server = array(
+            'CONTENT_TYPE'   => 'Content-Type',
+            'CONTENT_LENGTH' => 'Content-Length',
+            'CONTENT_MD5'    => 'Content-Md5',
+        );
+
+        foreach ($_SERVER as $key => $value) {
+            if (substr($key, 0, 5) === 'HTTP_') {
+                $key = substr($key, 5);
+                if (!isset($copy_server[$key]) || !isset($_SERVER[$key])) {
+                    $key = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', $key))));
+                    $headers[$key] = $value;
+                }
+            } elseif (isset($copy_server[$key])) {
+                $headers[$copy_server[$key]] = $value;
+            }
+        }
+
+        if (!isset($headers['Authorization'])) {
+            if (isset($_SERVER['REDIRECT_HTTP_AUTHORIZATION'])) {
+                $headers['Authorization'] = $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];
+            } elseif (isset($_SERVER['PHP_AUTH_USER'])) {
+                $basic_pass = isset($_SERVER['PHP_AUTH_PW']) ? $_SERVER['PHP_AUTH_PW'] : '';
+                $headers['Authorization'] = 'Basic ' . base64_encode($_SERVER['PHP_AUTH_USER'] . ':' . $basic_pass);
+            } elseif (isset($_SERVER['PHP_AUTH_DIGEST'])) {
+                $headers['Authorization'] = $_SERVER['PHP_AUTH_DIGEST'];
+            }
+        }
+
+        return $headers;
+    }
+
+}