Add discord notification for map management system

[RushFTK]

主体和your turn noficition一样，内容如下：

• 所有的消息都包含一个卡片 包含地图信息：

  Map Review Notification:
  Status: Waiting for Review/Pending/Accept/Rejected.
  Map Chinese name:
  Map English Name:
  Map Size:                         Available Player:
  Available Mode: Single & Muti

  对于提交的地图，通知格式如下：

  @Creator, you are map is successful upload for @map_review_team to review. 
  {地图卡片: Status = Waiting for Review}

  其中，@Creator, 替换为作者的discord id，@map_review_team替换为地图审核团队的Discord Role名称 对于有审核员通过，但是数量不够的地图(为了未来的多审核员通过制度)，通知格式如下：

  @Creator, your map is nearly accpet status // 这句话我得再考虑考虑怎么说- -
  {地图卡片: Status = Pending}

  对于通过的地图，通知格式如下：

  @Creator, congrats your map have been accepted and can be played on other modes!. check comments for future information!
  {地图卡片: Status = Accept}

  对于被拒绝的地图，通知格式如下：

  @Creator, sorry your map have been rejected, check comments to do some fix, and feel free to upload it again!
  {地图卡片: Status = Rejected}

[BusterBeachside]

+1 to this, would be great!