message: add: new message flags
diff: /** https://discord.com/developers/docs/resources/channel#message-object-message-flags */
  export enum DiscordMessageFlags {
  /** This message has been published to subscribed channels (via Channel Following) */
  - CROSSPOSTED = 1 << 0,
  + Crossposted = 1 << 0,
  /** This message originated from a message in another channel (via Channel Following) */
  - IS_CROSSPOST = 1 << 1,
  + IsCrosspost = 1 << 1,
  /** Do not include any embeds when serializing this message */
  - SUPPRESS_EMBEDS = 1 << 2,
  + SuppressEmbeeds = 1 << 2,
  /** The source message for this crosspost has been deleted (via Channel Following) */
  - SOURCE_MESSAGE_DELETED = 1 << 3,
  + SourceMessageDeleted = 1 << 3,
  /** This message came from the urgent message system */
  - URGENT = 1 << 4,
  + Urgent = 1 << 4,
  + /** This message has an associated thread, with the same id as the message */
  + HasThread = 1 << 5,
  /** This message is only visible to the user who invoked the Interaction */
  - EMPHERAL = 1 << 6,
  + Empheral = 1 << 6,
  /** This message is an Interaction Response and the bot is "thinking" */
  - LOADING = 1 << 7,
  + Loading = 1 << 7,
  }
  