feat(wxapi): 新增草稿箱相关接口

src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinDraft/CgibinDraftSwitchResponse.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /cgi-bin/draft/switch 接口的响应。</para>
+    /// </summary>
+    public class CgibinDraftSwitchResponse : WechatApiResponse
+    {
+        /// <summary>
+        /// 获取或设置是否开启草稿箱功能。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("is_open")]
+        [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.NumericalBooleanConverter))]
+        [System.Text.Json.Serialization.JsonPropertyName("is_open")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.NumericalBooleanConverter))]
+        public bool IsOpen { get; set; }
+    }
+}