feat(wxapi): 封装公众平台、开放平台接口

src/SKIT.FlurlHttpClient.Wechat.Api/Models/Merchant/Common/MerchantCommonUploadImageResponse.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /merchant/common/upload_img 接口的响应。</para>
+    /// </summary>
+    public class MerchantCommonUploadImageResponse : WechatApiResponse
+    {
+        /// <summary>
+        /// 获取或设置图片 URL。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("image_url")]
+        [System.Text.Json.Serialization.JsonPropertyName("image_url")]
+        public string ImageUrl { get; set; } = default!;
+    }
+}