feat(upload): 添加华为 OBS 对象存储支持

- 在 addons.php 中添加了与华为 OBS 相关的钩子
- 新增了对华为 OBS 上传功能的实现，包括分片上传和合并
- 优化了上传参数处理和错误处理
- 支持客户端和服务端两种上传模式

addons/hwobs/library/Signer.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace addons\hwobs\library;
+
+use Obs\Internal\Common\Model;
+use Obs\Internal\Signature\DefaultSignature;
+
+class Signer
+{
+
+    public function __construct()
+    {
+    }
+
+    /**
+     * 获取分片文件的签名
+     * @param string $url
+     * @param string $uploadId
+     * @param int    $fileSize
+     * @param int    $partSize
+     * @param string $date
+     * @return array
+     */
+    public static function getPartsAuthorization($url, $uploadId, $fileSize, $partSize, $date)
+    {
+        $config = get_addon_config('hwobs');
+        $i = 0;
+        $size_count = $fileSize;
+        $values = array();
+        while ($size_count > 0) {
+            $size_count -= $partSize;
+            $values[] = array(
+                $partSize * $i,
+                ($size_count > 0) ? $partSize : ($size_count + $partSize),
+            );
+            $i++;
+        }
+
+        $httpMethod = "PUT";
+        $headers = [
+            "Host"           => str_replace(['http://', 'https://'], '', $config['uploadurl']),
+            "Content-Length" => 0,
+            "x-amz-date"     => $date,
+        ];
+
+        $result = [];
+        foreach ($values as $index => $value) {
+            $headers['Content-Length'] = $value[1];
+            $params = ['partNumber' => $index + 1, 'uploadId' => $uploadId, 'uriParam' => $url, 'dnsParam' => $config['bucket'], 'x-amz-date' => $date];
+            $model = new Model($params);
+            $sign = new DefaultSignature($config['accessKey'], $config['secretKey'], false, $config['uploadurl'], $httpMethod, 'v2', false, false);
+            $requestConfig = [
+                'httpMethod'        => $httpMethod,
+                'requestParameters' => [
+                    'x-amz-date' => ['location' => 'header'],
+                    'partNumber' => ['location' => 'query'],
+                    'uploadId'   => ['location' => 'query'],
+                    'uriParam'   => ['location' => 'uri'],
+                    'dnsParam'   => ['location' => 'dns'],
+                ]
+            ];
+            $sig = $sign->doAuth($requestConfig, $params, $model);
+            $result[] = $sig['headers']['Authorization'];
+        }
+
+        return $result;
+    }
+}