Support link card processing

[eharris128]

What

• On bluesky, when a user's post has a link in it, the user has the option to include a link card at the bottom of the post. We want to support this inside of the plugin as well.

Discussion thread

https://bsky.app/profile/mathewlowry.bsky.social/post/3lckgd7anh22s

[eharris128]

And I think I ticked this off now with release 1.0.8