Use site store for title and social metas

src/routes/_error.svelte

@@ -1,5 +1,6 @@
 <script>
     import { onMount } from 'svelte'
+    import { site } from '../utils/store'
 
     // Dependencies
     import AOS from 'aos'
@@ -28,7 +29,7 @@
 </script>
 
 <svelte:head>
-    <title>Houses Of - {error.message}</title>
+    <title>{$site.seo_name} - {error.message}</title>
 </svelte:head>
 
 <section class="page">