Hearts: Let the AI continuously play games

When there are no human players (toggled with Shift-F10) the AI will
continuously start new games when the current game has finished.

Userland/Games/Hearts/Game.cpp

@@ -337,11 +337,23 @@ void Game::continue_game_after_delay(int interval_ms)
 
 void Game::advance_game()
 {
-    if (game_ended()) {
+    if (m_state == State::Play && game_ended()) {
+        m_state = State::GameEndedWaiting;
         on_status_change("Game ended.");
+        continue_game_after_delay(2000);
         return;
     }
 
+    if (m_state == State::GameEndedWaiting) {
+        m_state = State::GameEnded;
+        if (!m_players[0].is_human)
+            setup(move(m_players[0].name));
+        return;
+    }
+
+    if (m_state == State::GameEnded)
+        return;
+
     if (m_state == State::PassingSelect) {
         if (!m_players[0].is_human) {
             select_cards_for_passing();

Userland/Games/Hearts/Game.h

@@ -77,6 +77,8 @@ private:
         PassingSelectConfirmed,
         PassingAccept,
         Play,
+        GameEndedWaiting,
+        GameEnded,
     };
 
     State m_state { State::PassingSelect };