feat: update playground paths

playground/src/routes/+layout.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+	import { assets } from '$app/paths';
 	import favicon from '$lib/assets/favicon.svg';
 	import '../app.css';
 
@@ -8,7 +9,7 @@
 <svelte:head>
 	<link rel="icon" href={favicon} />
 	<title>Marka Playground</title>
-	<script src="/wasm_exec.js"></script>
+	<script src="{assets("/wasm_exec.js")}></script>
 </svelte:head>
 
 {@render children?.()}