message: feat(types): add available, guildId, user, sortValue to MessageSticker
diff: import { DiscordMessageStickerFormatTypes } from "./message_sticker_format_types.ts";
  +import type { User } from "../users/user.ts";
  /** https://discord.com/developers/docs/resources/channel#message-object-message-sticker-structure */
  export interface MessageSticker {
  @@ -19,4 +20,12 @@ export interface MessageSticker {
  asset: string;
  /** Type of sticker format */
  formatType: DiscordMessageStickerFormatTypes;
  + /** Whether or not the sticker is available */
  + available?: boolean;
  + /** Id of the guild that owns this sticker */
  + guildId?: string;
  + /** The user that uploaded the sticker */
  + user?: User;
  + /** A sticker's sort order within a pack */
  + sortValue?: number;
  }
  