If you are finding heart game like on computer windows, i think there is none of casino that want to build that kind of game. First thing because it really takes time and better if they opened some poker games and poker will be much attractive to Hearts. Second thing is Heart is PvP games and the only PvP games that really attract people to play is only poker, so there is no point of making this kind of site with Heart game
Once could make it 3 CPU's vs a person.
Like this:
https://cardgames.io/hearts/The only thing they (the house) would need to do is be provably fair and have a database that can handle scores per player account and how many bitcoins they have won/lost.