Please add support for Open Graph protocol tags #974
Description
Pagefind should read Open Graph protocol meta tags from pages to get the title, URL, and image information for use in search results. Example tags from the <head> of a document:
<meta property="og:title" content="Apple Turnaround">
<meta property="og:url" content="http://hypercritical.co/2025/05/20/apple-turnaround">
<meta property="og:image" content="https://hypercritical.co/2025/05/20/images/apple-turnaround.png">
<meta property="og:image:alt" content="A classic Apple logo rotating within a logo-shaped cutout on a platinum background">
<meta property="og:image:width" content="640">
<meta property="og:image:height" content="303">
Right now, Pagefind often requires data-pagefind-meta=… attributes to be added in various places in the pages that are being indexed, even if all the desired information is ready and waiting in these og:… meta tags.
(If there's a way to add data-pagefind-meta=… attributes these meta tags, that could be a temporary workaround, but I could not get it to work.)