Add router and tailwind

frontend/src/App.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
 	import Header from "$lib/components/Header.svelte";
+	import Router from "$lib/router/Router.svelte";
 	import { Greet } from "../wailsjs/go/main/App.js";
 
 	let resultText: string = "Please enter your name below 👇";
@@ -15,4 +16,4 @@
 	<main class="flex-1">
 		<Router />
 	</main>
-</template>
+</template>

frontend/src/lib/router/Router.svelte

@@ -0,0 +1,10 @@
+<script lang="ts">
+	import Router from 'svelte-spa-router'
+	import Energy from '$lib/components/Energy/Energy.svelte'
+
+	const routes = {
+		'/': Energy,
+	}
+</script>
+
+<Router {routes} />