fix combobox type exports

src/lib/index.ts

@@ -2,7 +2,11 @@
 export { default as Button } from './Button.svelte';
 export { default as CenterBox } from './CenterBox.svelte';
 export { default as Checkbox } from './Checkbox.svelte';
-export { default as Combobox } from './Combobox.svelte';
+export {
+	default as Combobox,
+	type ComboboxItem,
+	type ComboboxChangeEvent
+} from './Combobox.svelte';
 export { default as FramelessButton } from './FramelessButton.svelte';
 export { default as InjectGoogleMaps } from './InjectGoogleMaps.svelte';
 export { default as InjectUmami } from './InjectUmami.svelte';