Port application from Next.js to Nuxt

Nuxt is based on Vue.js and I find their building blocks to be much
neater compared to the React based Next.js.

server/api/events.ts

@@ -0,0 +1,31 @@
+import { addStream, deleteStream } from "~/server/streams";
+
+export default defineEventHandler(async (event) => {
+	const encoder = new TextEncoder();
+	const source = event.headers.get("x-forwarded-for");
+	console.log(`starting event stream for ${source}`)
+	const stream = new TransformStream<string, Uint8Array>({
+		transform(chunk, controller) {
+			controller.enqueue(encoder.encode(chunk));
+		},
+		flush(controller) {
+			console.log(`finished event stream for ${source}`);
+			deleteStream(stream.writable);
+		},
+		// @ts-expect-error experimental API
+		cancel(reason) {
+			console.log(`cancelled event stream for ${source}`);
+			deleteStream(stream.writable);
+		}
+	})
+	addStream(stream.writable);
+	return new Response(
+		stream.readable,
+		{
+			headers: {
+				"Access-Control-Allow-Origin": "*",
+				"Content-Type": "text/event-stream",
+			}
+		}
+	);
+});