update to svelte 5

src/routes/+layout.svelte

@@ -1,6 +1,11 @@
 <script lang="ts">
   import FooterComponent from '$lib/components/FooterComponent.svelte';
   import { SvelteToast } from '@zerodevx/svelte-toast';
+  interface Props {
+    children?: import('svelte').Snippet;
+  }
+
+  let { children }: Props = $props();
 
   const options = {
     pausable: true,
@@ -8,7 +13,7 @@
   };
 </script>
 
-<slot />
+{@render children?.()}
 <SvelteToast {options} />
 <div class="footer">
   <FooterComponent />