feat(StageInstanceManager): add guildScheduledEvent to create() (#8885)

* feat(StageInstanceManager): add `guildScheduledEvent` to `create()`

* fix: requested changes

---------

Co-authored-by: Jiralite <33201955+Jiralite@users.noreply.github.com>

Author: almeidx

packages/discord.js/src/managers/StageInstanceManager.js

@@ -32,6 +32,8 @@ class StageInstanceManager extends CachedManager {
    * @property {string} topic The topic of the stage instance
    * @property {StageInstancePrivacyLevel} [privacyLevel] The privacy level of the stage instance
    * @property {boolean} [sendStartNotification] Whether to notify `@everyone` that the stage instance has started
+   * @property {GuildScheduledEventResolvable} [guildScheduledEvent]
+   * The guild scheduled event associated with the stage instance
    */
 
   /**
@@ -59,14 +61,17 @@ class StageInstanceManager extends CachedManager {
     const channelId = this.guild.channels.resolveId(channel);
     if (!channelId) throw new DiscordjsError(ErrorCodes.StageChannelResolve);
     if (typeof options !== 'object') throw new DiscordjsTypeError(ErrorCodes.InvalidType, 'options', 'object', true);
-    let { topic, privacyLevel, sendStartNotification } = options;
+    const { guildScheduledEvent, topic, privacyLevel, sendStartNotification } = options;
+
+    const guildScheduledEventId = guildScheduledEvent && this.resolveId(guildScheduledEvent);
 
     const data = await this.client.rest.post(Routes.stageInstances(), {
       body: {
         channel_id: channelId,
         topic,
         privacy_level: privacyLevel,
         send_start_notification: sendStartNotification,
+        guild_scheduled_event_id: guildScheduledEventId,
       },
     });
 

packages/discord.js/typings/index.d.ts

@@ -5214,6 +5214,7 @@ export interface StageInstanceCreateOptions {
   topic: string;
   privacyLevel?: StageInstancePrivacyLevel;
   sendStartNotification?: boolean;
+  guildScheduledEvent?: GuildScheduledEventResolvable;
 }
 
 export interface CrosspostedChannel {