chore(form): add stories for Form, FormItem, FormLabel

src/components/FormLabel/FormLabel.Story.svelte

@@ -0,0 +1,17 @@
+<script>
+  export let story = undefined;
+
+  import Layout from '../../internal/ui/Layout.svelte';
+  import Tooltip from '../Tooltip';
+  import FormLabel from './FormLabel.svelte';
+</script>
+
+<Layout>
+  {#if story === 'tooltip'}
+    <FormLabel>
+      <Tooltip triggerText="Label">This is the content of the tooltip.</Tooltip>
+    </FormLabel>
+  {:else}
+    <FormLabel>Label</FormLabel>
+  {/if}
+</Layout>

src/components/FormLabel/FormLabel.stories.js

@@ -0,0 +1,8 @@
+import { withKnobs } from '@storybook/addon-knobs';
+import Component from './FormLabel.Story.svelte';
+
+export default { title: 'FormLabel', decorators: [withKnobs] };
+
+export const Default = () => ({ Component });
+
+export const WithTooltip = () => ({ Component, props: { story: 'tooltip' } });