Add solution as app-b

Author: tsabirgaliev

content/tutorial/03-sveltekit/08-stores/03-updated-store/app-b/src/routes/+layout.svelte

@@ -0,0 +1,29 @@
+<script>
+	import { page, navigating, updated } from '$app/stores';
+</script>
+
+<nav>
+	<a href="/" aria-current={$page.url.pathname === '/'}>
+		home
+	</a>
+
+	<a href="/about" aria-current={$page.url.pathname === '/about'}>
+		about
+	</a>
+
+	{#if $navigating}
+		navigating to {$navigating.to.url.pathname}
+	{/if}
+</nav>
+
+<slot />
+
+{#if $updated}
+	<p class="toast">
+		A new version of the app is available
+
+		<button on:click={() => location.reload()}>
+			reload the page
+		</button>
+	</p>
+{/if}