Storybook: Adds FormToggle component (#18085)

* Add FormToggle coomponent to storybook

* Update to use example

* Update to use withState component name

* Update packages/components/src/form-toggle/stories/index.js

* Format file

* Update index.js

Co-authored-by: Grzegorz (Greg) Ziółkowski <grzegorz@gziolo.pl>

packages/components/src/form-toggle/stories/index.js

@@ -0,0 +1,28 @@
+/**
+ * WordPress dependencies
+ */
+import { useState } from '@wordpress/element';
+
+/**
+ * Internal dependencies
+ */
+import FormToggle from '../';
+
+export default { title: 'Components/FormToggle', component: FormToggle };
+
+const FormToggleWithState = ( { checked, ...props } ) => {
+	const [ isChecked, setChecked ] = useState( checked );
+	return (
+		<FormToggle
+			{ ...props }
+			checked={ isChecked }
+			onChange={ () => {
+				setChecked( ! isChecked );
+			} }
+		/>
+	);
+};
+
+export const _default = () => {
+	return <FormToggleWithState checked />;
+};