fix missing icon utility exports

src/lib/index.ts

@@ -23,7 +23,14 @@ export { default as TimeInput } from './TimeInput.svelte';
 export { default as TimezoneInput } from './TimezoneInput.svelte';
 export { default as ToggleGroup } from './ToggleGroup.svelte';
 export { default as ToggleSelect } from './ToggleSelect.svelte';
-export { type Option, type MaybeGetter, getLabel, getValue } from './util';
+export {
+	type Option,
+	type MaybeGetter,
+	type IconDef,
+	getLabel,
+	getValue,
+	defaultIconProps
+} from './util';
 export {
 	type ToolbarToggleState,
 	type ToolbarToggleOptions,