Embedded data for share.firefox.dev links

It would be useful for devs to see a summary for shared profile links in services like Matrix/Slack/Twitter/etc.

oEmbed might solve this, so we can maintain this separate from the interface.

As a strawperson idea:

v0 could at least show generic Firefox Profiler pitch.
v1 could show meta data of the profile
v2 could show a screenshot of the timeline

Related

* https://medium.com/slack-developer-blog/everything-you-ever-wanted-to-know-about-unfurling-but-were-afraid-to-ask-or-how-to-make-your-e64b4bb9254: Reads oEmbed, Twitter card, Open Graph
* https://developer.twitter.com/en/docs/tweets/optimize-with-cards/guides/getting-started

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-268)