[fix] add missing types for chatkit.ready

Author: weedon-openai

.changeset/brave-dancers-add.md

@@ -0,0 +1,5 @@
+---
+'@openai/chatkit': patch
+---
+
+Added missing types for `chatkit.ready` event

packages/chatkit/types/index.d.ts

@@ -914,6 +914,9 @@ export interface OpenAIChatKit extends HTMLElement {
  * DOM events emitted by the `openai-chatkit` custom element.
  */
 export type ChatKitEvents = {
+  /** Emitted when the ChatKit frame has loaded. */
+  'chatkit.ready': CustomEvent<void>;
+
   /** Emitted when an error occurs. You should log these for monitoring and debugging. */
   'chatkit.error': CustomEvent<{ error: Error }>;