feat: 缺少BotLeaveEventDisband事件

Mirai.Net/Data/Events/Concretes/Group/DisbandedEvent.cs

@@ -0,0 +1,33 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Mirai.Net.Data.Events.Concretes.Group
+{
+
+    /// <summary>
+    /// Bot因群主解散群而退出群
+    /// </summary>
+    public record DisbandedEvent : EventBase
+    {
+
+        /// <summary>
+        /// 事件类型
+        /// </summary>
+        public override Events Type { get; set; } = Events.Disbanded;
+
+        /// <summary>
+        ///     Bot所在被解散的群的信息
+        /// </summary>
+        [JsonProperty("group")]
+        public Shared.Group Group { get; set; }
+
+        /// <summary>
+        ///     Bot离开群后获取操作人的 Member 对象
+        /// </summary>
+        [JsonProperty("operator")]
+        public Shared.Member Operator { get; set; }
+
+    }
+}

Mirai.Net/Data/Events/Events.cs

@@ -97,7 +97,14 @@ public enum Events
     /// </summary>
     [Description("BotLeaveEventKick")]
     [EnumMember(Value = "BotLeaveEventKick")]
-    Kicked,
+    Kicked,
+
+    /// <summary>
+    ///     Bot因群主解散群而退出群
+    /// </summary>
+    [Description("BotLeaveEventDisband")]
+    [EnumMember(Value = "BotLeaveEventDisband")]
+    Disbanded,
 
     /// <summary>
     ///     群消息撤回