docs(tracing): Add performance note to enableTimeToInitialDisplay JSDoc

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: antonis

packages/core/src/js/tracing/reactnavigation.ts

@@ -117,6 +117,9 @@ interface ReactNavigationIntegrationOptions {
    * Time to initial display measures the time it takes from
    * navigation dispatch to the render of the first frame of the new screen.
    *
+   * Note: Enabling this adds native bridge calls on every navigation
+   * which may cause noticeable overhead on low-end devices.
+   *
    * @default false
    */
   enableTimeToInitialDisplay: boolean;