Add story for Toggle component

[MAILPOET-2773]

assets/js/src/common/form/toggle/_stories/toggle.tsx

@@ -0,0 +1,36 @@
+import React from 'react';
+import { action } from '@storybook/addon-actions';
+import Toggle from '../toggle';
+import Heading from '../../../typography/heading/heading';
+import Grid from '../../../grid';
+
+export default {
+  title: 'Form',
+  component: Toggle,
+};
+
+export const Toggles = () => (
+  <>
+    <Heading level={3}>Toggles</Heading>
+    <Grid.Column dimension="small">
+      <Grid.SpaceBetween>
+        <label htmlFor="toggle-1">Toggle regular</label>
+        <Toggle
+          onCheck={action('toggle-1')}
+          id="toggle-1"
+          name="toggle-1"
+        />
+      </Grid.SpaceBetween>
+      <div className="mailpoet-gap" />
+      <Grid.SpaceBetween>
+        <label htmlFor="toggle-2">Toggle small</label>
+        <Toggle
+          onCheck={action('toggle-2')}
+          dimension="small"
+          id="toggle-2"
+          name="toggle-2"
+        />
+      </Grid.SpaceBetween>
+    </Grid.Column>
+  </>
+);