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/__error.svelte

@@ -0,0 +1,15 @@
+<script context="module">
+	export function load({ error, status }) {
+		return {
+			props: {
+				error: `${status}: ${error.message}`
+			}
+		};
+	}
+</script>
+
+<script>
+	export let error;
+</script>
+
+<h1 class="text-xl font-bold">{error}</h1>