v1.0.12 - Sveltekit migration (#44)

Changed the whole tech stack to SvelteKit which means:
- Typescript 
- SSR
- No fastify :(
- Beta, but it's fine!

Other changes:
- Tailwind -> Tailwind JIT
- A lot more

src/routes/success.svelte

@@ -0,0 +1,13 @@
+<script>
+	import { browser } from '$app/env';
+	if (browser) {
+		setTimeout(() => {
+			window.close();
+		}, 1000);
+	}
+
+</script>
+
+<div class="flex w-full h-screen justify-center items-center">
+	<div class="text-3xl font-bold">Succesfully logged in! 🎉</div>
+</div>