chore: import upstream snapshot with attribution

apps/webapp/app/hooks/useScrollContainerToTop.ts

@@ -0,0 +1,14 @@
+import { useLocation } from "@remix-run/react";
+import { useEffect, useRef } from "react";
+
+/** Scroll a page body container back to the top when navigating to a route. */
+export function useScrollContainerToTop<T extends HTMLElement>() {
+  const ref = useRef<T>(null);
+  const location = useLocation();
+
+  useEffect(() => {
+    ref.current?.scrollTo(0, 0);
+  }, [location.key]);
+
+  return ref;
+}