Detection of an adversary in front of the robot

[Terae]

Actually, the AvoidanceInterfacer is able to find all repere::Positions of robots on the environment.

Moreover, it can say if an adversary is under a disk around the robot (bool adversary_detected(Distance threshold))

You should do better by also giving the advance sens of our robot: we want to detect adversaries only if it is in front of our robot in a cone of N degrees (or behind in the case of a backward move)

The function is already implemented, you only need to program the most-mathematical part 😄