feat: add Locales to Interactions (#7131)

Co-authored-by: Rodry <38259440+ImRodry@users.noreply.github.com>

src/structures/Interaction.js

@@ -74,6 +74,18 @@ class Interaction extends Base {
      * @type {?Readonly<Permissions>}
      */
     this.memberPermissions = data.member?.permissions ? new Permissions(data.member.permissions).freeze() : null;
+
+    /**
+     * The locale of the user who invoked this interaction
+     * @type {string}
+     */
+    this.locale = data.locale;
+
+    /**
+     * The preferred locale from the guild this interaction was sent in
+     * @type {?string}
+     */
+    this.guildLocale = data.guild_locale ?? null;
   }
 
   /**