Check for result when player stands

Now let's continue with the endgame scenarios and check the hand values after the player stand, we can just add the logic to our update():

} Message::Stand => {
    self.game_stage = GameStage::Standing;
    if self.dealer_hand.value() == self.player_hand.value() {
        self.game_stage = GameStage::Tie;
    } else if self.dealer_hand.value() > self.player_hand.value()  {
        self.game_stage = GameStage::HouseWon;
    } else {
        self.game_stage = GameStage::PlayerWon;
    }
}

Since we already have the view prepared, this was all we needed.