feat: render threading

src/workers/render.ts

@@ -0,0 +1,9 @@
+import { parentPort, threadId } from 'worker_threads';
+import svgToPng from '../core/blitzkrieg/svgToPng';
+
+console.log(`🟢 Launched render worker ${threadId}`);
+
+parentPort?.on('message', async (svg: string) => {
+  const png = svgToPng(svg);
+  parentPort?.postMessage(png);
+});