feat: Add message_format to message event

src/onebot11/constructor.ts

@@ -45,6 +45,7 @@ export class OB11Constructor {
             font: 14,
             sub_type: "friend",
             message: [],
+            message_format: 'array',
             post_type: selfInfo.uin == msg.senderUin ? EventType.MESSAGE_SENT : EventType.MESSAGE,
         }
         if (msg.chatType == ChatType.group) {

src/onebot11/types.ts

@@ -65,7 +65,8 @@ export interface OB11Message {
     message_type: "private" | "group",
     sub_type?: "friend" | "group" | "normal",
     sender: OB11Sender,
-    message: OB11MessageData[],
+    message: OB11MessageData[] | string,
+    message_format: 'array' | 'string',
     raw_message: string,
     font: number,
     post_type?: EventType,