Add splash screen

frontend/src/routes/+page.svelte

@@ -1,8 +1,10 @@
 <script>
 	import BottomAppBar from './components/BottomAppBar.svelte';
 	import Path from './components/Path.svelte';
+	import Splash from './components/Splash.svelte';
 </script>
 
+<Splash></Splash>
 <header>
 	<div id="welcome-message">Benvenuti a <span class="bold">Pianello Val Tidone</span></div>
 </header>

frontend/src/routes/components/Splash.svelte

@@ -2,12 +2,12 @@
 	import { onMount } from 'svelte';
 	import { fade } from 'svelte/transition';
 
-	let visible = false;
+	let visible = true;
 
 	onMount(() => {
 		setTimeout(() => {
-			visible = true;
-		}, 500);
+			visible = false;
+		}, 1000);
 	});
 </script>
 
@@ -17,8 +17,8 @@
 
 <style>
 	img {
-		height: auto;
+		position: absolute;
+		height: 100vh;
 		margin: 0 auto;
-		width: 100%;
 	}
 </style>