Automatically use/display OpenGraph metadata/previews for external links added to Tiki (at least fetch the human-readable title when an inserted URL provides it in its metadata) for readability

Steps:

1. Review https://dev.tiki.org/Link-Preview
2. Scope this space to learn about all the options.
3. A community discussion to decide on the best option for us: https://dev.tiki.org/How-to-pick-a-software-library
4. Implement

Some starting points:

• https://dev.tiki.org/Embed
• 2022 update: just use OpenGraph when the website provides it, otherwise fallback to ripping out the HTML title tag and possibly the description/abstract tags and/or featured image, if any. We may not need/want to embed thumbnails (or maybe that could be an option, or prompt to the user on a case-by-case basis), but the text title certainly can be automatically used for the hyperlink. That's what Trello does when you put a compatible hyperlink in its description or comments fields. —Jeff''

When you volunteer for this, reach out to Marc or Jeff for a strategic discussion.

This should be done by the same person(s) as item61258-Tiki-URL-pasted-into-Discourse-Sorry-we-were-unable-to-generate-a-preview-for-this-web-page-because-the-following-oEmbed-OpenGraph-tag-could-not-be-found-image