Returned by usePlayRichContent to the cards that play a link.
playRichContent: (rc: PlayableRichContent,dumpHref?: string) => Promise<boolean>
Plays rc, its title in the player linking to the dump page dumpHref.
Resolves to false when nothing could play, so the caller can open the link
instead.
pending: boolean
True while a Bandcamp page is being resolved.