feat: theme-color head tags

Author: WarningImHack3r

src/app.html

@@ -6,6 +6,8 @@
 			rel="icon"
 			href="https://raw.githubusercontent.com/sveltejs/branding/master/svelte-logo.svg"
 		/>
+		<meta name="theme-color" content="#f97316" media="(prefers-color-scheme: light)" />
+		<meta name="theme-color" content="#ea580c" media="(prefers-color-scheme: dark)" />
 		<meta name="viewport" content="width=device-width, initial-scale=1" />
 		%sveltekit.head%
 	</head>