feat: start FAQ page

src/element/async-loader.tsx

@@ -0,0 +1,10 @@
+import { ReactNode, useEffect, useState } from "react";
+
+export function Async<T>({ loader, then }: { loader: () => Promise<T>, then: (v: T) => ReactNode }) {
+    const [res, setResult] = useState<T>();
+    useEffect(() => {
+        loader().then(setResult);
+    }, []);
+    if (!res) return;
+    return then(res);
+}