Add SetVelocity

Propulsion.cpp

@@ -35,6 +35,8 @@ void Propulsion::SetTwistSpeed(Vector2 linear, float yaw) {}
 void Propulsion::SetTwistSpeed(Vector3 linear, float yaw, float pitch,
                                float roll) {}
 
+void Propulsion::SetVelocity(Polar velocity) {}
+
 Polar Propulsion::GetVelocity() { return Polar(0, 0); }
 
 float Propulsion::GetAngularVelocity() { return 0; }

Propulsion.h

@@ -59,6 +59,8 @@ public:
   virtual void SetTwistSpeed(Vector3 linear, float yaw = 0.0F,
                              float pitch = 0.0F, float roll = 0.0F);
 
+  virtual void SetVelocity(Polar velocity);
+
   /// @brief Retrieve the current velocity of the roboid
   /// @return The velocity in polar coordinates
   /// The actual units of the velocity depend on the implementation