add typescript support in svelte files, .js to .ts

src/lib/components/ui/Modal/Modal.svelte

@@ -41,7 +41,7 @@
 	}
 </style>
 
-<script>
+<script lang="ts">
 	import { fade } from 'svelte/transition';
 	export let size = 'xl'; // https://tailwindcss.com/docs/max-width#class-reference
 	export let open = false;