No error handling available for createInfiniteScroll

从 issue 中所示的 createInfiniteScroll 入口点开始，将其 JSX 文档与返回的 API 以及 createResource 的用法进行比较。确认预期的 loading 和 error 状态行为，然后验证公共 API 是否公开了这两种状态，以及相关行为是否经过测试。

Describe the bug

In the JSX Docs it clearly says that we get any errors using pages.error but the current implementation has not property that says error and loading... How am I suppose to get errors back

/**
 * Provides an easy way to implement infinite scrolling.
 *
 * ```ts
 * const [pages, loader, { page, setPage, setPages, end, setEnd }] = createInfiniteScroll(fetcher);
 * ```
 * @param fetcher `(page: number) => Promise<T[]>`
 * @return `pages()` is an accessor contains array of contents
 * @property `pages.loading` is a boolean indicator for the loading state
 * @property `pages.error` contains any error encountered
 * @return `infiniteScrollLoader` is a directive used to set the loader element
 * @method `page` is an accessor that contains page number
 * @method `setPage` allows to manually change the page number
 * @method `setPages` allows to manually change the contents of the page
 * @method `end` is a boolean indicator for end of the page
 * @method `setEnd` allows to manually change the end
 */
export function createInfiniteScroll<T>(fetcher: (page: number) => Promise<T[]>): [
  pages: Accessor<T[]>,
  loader: (el: Element) => void,
  options: {
    page: Accessor<number>;
    setPage: Setter<number>;
    setPages: Setter<T[]>;
    end: Accessor<boolean>;
    setEnd: Setter<boolean>;
  },
] {
  const [pages, setPages] = createSignal<T[]>([]);
  const [page, setPage] = createSignal(0);
  const [end, setEnd] = createSignal(false);

  let add: (el: Element) => void = noop;
  if (!isServer) {
    const io = new IntersectionObserver(e => {
      if (e.length > 0 && e[0]!.isIntersecting && !end() && !contents.loading) {
        setPage(p => p + 1);
      }
    });
    onCleanup(() => io.disconnect());
    add = (el: Element) => {
      io.observe(el);
      tryOnCleanup(() => io.unobserve(el));
    };
  }```

  const [contents] = createResource(page, fetcher);

  createComputed(() => {
    const content = contents.latest;
    if (!content) return;
    batch(() => {
      if (content.length === 0) setEnd(true);
      setPages(p => [...p, ...content]);
    });
  });

  return [
    pages,
    add,
    {
      page: page,
      setPage: setPage,
      setPages: setPages,
      end: end,
      setEnd: setEnd,
    },
  ];
}

### Minimal Reproduction Link

https://example.com/