Make referee and api agree on what the 'home point' is

At the moment there are two 'home' points.

The primary home point is owned by the PhysXCarApi and is used almost everywhere. This home point is the ground truth translation between unreal engines coordinate system and the simulations global frame. This one is created in SimModeBase line 458.

The other owned by the referee (initial_position) who looks at the position of the vehicle when the game starts (in some blueprint). This one is used in the `getRefereeState` and all cones sent out through the referee state are relative to this point.

Having these two points is confusing and probably causes bugs (see #144). So let's fix this.

Inizia in SimModeBase intorno alla riga 458 e segui il punto di origine creato per PhysXCarApi. Confrontalo con l’initial_position del referee e con il percorso getRefereeState, incluso il modo in cui i coni sono espressi rispetto a quel punto. Il lavoro è completato quando il referee e l’API usano un unico punto di origine concordato e producono coordinate coerenti.

Scritto dal modello di indicizzazione a partire dal testo della issue.