feat(intro): delay de spawn independent per al segon jugador en mode BOTH

source/game/scenes/room_fsm.cpp

@@ -43,6 +43,9 @@ namespace RoomFsm {
             cfg.intro_text_hold_ms = readChildInt(n, "text_hold_ms", cfg.intro_text_hold_ms);
             cfg.intro_text_exit_ms = readChildInt(n, "text_exit_ms", cfg.intro_text_exit_ms);
             cfg.player_spawn_delay_ms = readChildInt(n, "player_spawn_delay_ms", cfg.player_spawn_delay_ms);
+            // Per defecte el segon jugador cau alhora que el primer.
+            // El YAML pot trencar la simultaneïtat fixant un valor propi.
+            cfg.player2_spawn_delay_ms = readChildInt(n, "player2_spawn_delay_ms", cfg.player_spawn_delay_ms);
             cfg.intro_text_line_gap_px = readChildInt(n, "line_gap_px", cfg.intro_text_line_gap_px);
         }
         if (yaml.contains("room_outro")) {