[Add] MessageEventExecutionDebugger 添加对消息处理的调试器Enum;

[Add] BotEventHandler 添加对 MessageEventExecutionDebugger 的支持;
[Add] VirtualLoadMessageEvent 增加 toVirtualLoadMessageEvent(MessageEvent) 方法;

src/main/java/net/lamgc/cgj/bot/event/VirtualLoadMessageEvent.java

@@ -5,6 +5,28 @@ package net.lamgc.cgj.bot.event;
  */
 public class VirtualLoadMessageEvent extends MessageEvent {
 
+    /**
+     * 将任意消息事件转换为假负载消息事件.
+     * <p>转换之后, 除了fromGroup, fromQQ, message外其他信息不会保留</p>
+     * @param event 待转换的消息事件
+     * @param inheritImpl 是否继承除 sendMessage 外的其他 MessageEvent 实现
+     * @return 转换后的消息事件
+     */
+    public static VirtualLoadMessageEvent toVirtualLoadMessageEvent(MessageEvent event, boolean inheritImpl) {
+        if(event instanceof VirtualLoadMessageEvent) {
+            return (VirtualLoadMessageEvent) event;
+        } else if(!inheritImpl) {
+            return new VirtualLoadMessageEvent(event.getFromGroup(), event.getFromQQ(), event.getMessage());
+        } else {
+            return new VirtualLoadMessageEvent(event.getFromGroup(), event.getFromQQ(), event.getMessage()) {
+                @Override
+                public String getImageUrl(String image) {
+                    return event.getImageUrl(image);
+                }
+            };
+        }
+    }
+
     public VirtualLoadMessageEvent(long fromGroup, long fromQQ, String message) {
         super(fromGroup, fromQQ, message);
     }