add checkbox component

src/app.html

@@ -4,6 +4,13 @@
 		<meta charset="utf-8" />
 		<link rel="icon" href="%sveltekit.assets%/favicon.png" />
 		<meta name="viewport" content="width=device-width, initial-scale=1" />
+
+		<!-- Material Design Icons -->
+		<link
+			href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined"
+			rel="stylesheet"
+		/>
+
 		%sveltekit.head%
 	</head>
 	<body data-sveltekit-preload-data="hover">