Render Markdown and nostr URIs on Cards

[Pleb5]

• TicketCard, OfferCard, MessageCard and UserReviewCard can hold arbitrary text on them. These should be rendered in a nice way:
• Markdown Titles, Lists, URL-s (no images yet)
• Long links pasted without markdown notation should be shortened and be rendered as html a-tags
• Npubs, nip05 handles should be rendered with the target persons 'name' or 'display_name' attribute and shortened if too long
• Use some lib and draw inspiration from Highlighter, Coracle or nostrudel