move toastify css to app base

ref #11

src/App.svelte

@@ -1,5 +1,6 @@
 <script>
   // import TailwindStyles from "./TailwindStyles.svelte";
+  import "toastify-js/src/toastify.css";
   import { Route, router } from "tinro";
   router.subscribe((routeInfo) => {
     // console.log(routeInfo.path);