Make it so that the actor can reject embedded items using the Item pre-create hook

module/documents/Actor/Handler.mjs

@@ -39,4 +39,16 @@ export class ActorHandler extends Actor {
 		if (!this.fn?.[`createCustom${data.embeddedCreate}`]) return;
 		this.fn?.[`createCustom${data.embeddedCreate}`].bind(this)($event);
 	};
+
+	/**
+	 * @param {ItemHandler} item
+	 * @returns {boolean} true to allow the document to be embedded
+	 */
+	async preItemEmbed(item) {
+		let type = item.type[0].toUpperCase() + item.type.slice(1);
+		if (this.fn?.[`pre${type}Embed`]) {
+			return await this.fn?.[`pre${type}Embed`].bind(this)(item);
+		};
+		return true;
+	};
 };