聊天：拆分聊天逻辑到不同文件，精简接口参数，增加注释

game-server/app/servers/chat/handler/chatHandler.ts

@@ -100,7 +100,7 @@ export class ChatHandler {
         const roleId = session.get('roleId');
         const roleName = session.get('roleName');
         const msgData = await createPrivateMsg(roleId, roleName, type, MSG_SOURCE.ROLE_SEND_TEXT, content, targetRoleId, targetMsgCode);
-        await pushMsgToRole(targetRoleId, msgData);
+        await pushMsgToRole(msgData);
         if (!msgData) return resResult(STATUS.WRONG_PARMS);
         return resResult(STATUS.SUCCESS, msgData);
     }