[basic-example][m] - fix fetching of actual data

examples/basic-example/lib/loadUrlProxied.tsx

@@ -0,0 +1,11 @@
+export default async function loadUrlProxied(url: string) {
+  // HACK: duplicate of Excel code - maybe refactor
+  // if url is external may have CORS issue so we proxy it ...
+  if (url.startsWith("http")) {
+    const PROXY_URL = "/api/proxy";
+    url = PROXY_URL + "?url=" + encodeURIComponent(url);
+  }
+  const response = await fetch(url)
+  const data = await response.text()
+  return data
+}