move Header and files in its own folder

Author: ignatiusmb

packages/create-svelte/templates/default/src/lib/Header.svelte renamed to packages/create-svelte/templates/default/src/lib/header/Header.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import Header from '$lib/Header.svelte';
+	import Header from '$lib/header/Header.svelte';
 	import '../app.css';
 </script>