Support Bluesky posts

[Glodenox]

Supporting Bluesky seems reasonably easy to do, similar to what is already supported for Twitter/X: https://docs.bsky.app/docs/advanced-guides/oembed Only the format https://bsky.app/profile/*/post/* is supported, so that is easy to check for.

A request would be https://embed.bsky.app/oembed?url=https://bsky.app/profile/did:plc:vjug55kidv6sye7ykr5faxxn/post/3jzn6g7ixgq2y&format=json. In the response JSON the blockquote is stored within the html field. Instead of fully loading everything, it is probably better to manipulate that response and style that, instead of loading post statistics (as the post will only be shown shortly).