Initialise la scène MainMenu avec les éléments de base : caméras, éclairage, et un plan.
Ajoute une caméra secondaire pour un écran additionnel et un volume global pour le post-processing.
Adds a traditional brake alongside the existing handbrake functionality.
This change allows for more controlled deceleration using a standard braking system and introduces a brake power parameter in the vehicle controller for further adjustment. The input manager is updated to accommodate a new brake input, and the vehicle controller uses this input to apply a progressive braking force, particularly at lower speeds.
Also corrects a typo in the braking logic.
