feat: add capabilities

packages/playground/src/experiments/hello/index.tsx

@@ -0,0 +1,12 @@
+const Foo = () => {
+  return <div></div>;
+};
+
+const worker = () =>
+  new Worker(new URL('./script.ts', import.meta.url), {
+    type: 'module',
+  });
+
+const view = <Foo />;
+
+export { worker, view };