[examples] Fix styles in sveltekit examples

Author: x0k

examples/sveltekit-starter/src/routes/+layout.svelte

@@ -0,0 +1,9 @@
+<script lang="ts">
+  import type { Snippet } from 'svelte';
+
+  import '@sjsf/basic-theme/css/basic.css';
+
+  const { children }: { children: Snippet } = $props()
+</script>
+
+{@render children()}