feat(StageInstance): add support for associated guild event (#7713)

src/structures/StageInstance.js

@@ -72,6 +72,16 @@ class StageInstance extends Base {
     } else {
       this.discoverableDisabled ??= null;
     }
+
+    if ('guild_scheduled_event_id' in data) {
+      /**
+       * The associated guild scheduled event id of this stage instance
+       * @type {?Snowflake}
+       */
+      this.guildScheduledEventId = data.guild_scheduled_event_id;
+    } else {
+      this.guildScheduledEventId ??= null;
+    }
   }
 
   /**
@@ -83,6 +93,15 @@ class StageInstance extends Base {
     return this.client.channels.resolve(this.channelId);
   }
 
+  /**
+   * The associated guild scheduled event of this stage instance
+   * @type {?GuildScheduledEvent}
+   * @readonly
+   */
+  get guildScheduledEvent() {
+    return this.guild?.scheduledEvents.resolve(this.guildScheduledEventId) ?? null;
+  }
+
   /**
    * Whether or not the stage instance has been deleted
    * @type {boolean}

typings/index.d.ts

@@ -2246,8 +2246,10 @@ export class StageInstance extends Base {
   public topic: string;
   public privacyLevel: PrivacyLevel;
   public discoverableDisabled: boolean | null;
+  public guildScheduledEventId?: Snowflake;
   public readonly channel: StageChannel | null;
   public readonly guild: Guild | null;
+  public get guildScheduledEvent(): GuildScheduledEvent | null;
   public edit(options: StageInstanceEditOptions): Promise<StageInstance>;
   public delete(): Promise<StageInstance>;
   public setTopic(topic: string): Promise<StageInstance>;