Correct wheel alignment angle unit contract

[rhorvath02]

Finding

Wheel toe and camber parameters were declared as SI radians while their API and all existing numerical use treated them as degrees. The current numerical path was functional, but the type contract allowed callers to supply radian values that would then be interpreted as degrees.

Fix

Declare the record fields as Modelica.Units.NonSI.Angle_deg and replace manual pi/180 arithmetic with explicit Modelica.Units.Conversions.from_deg calls where radian frame APIs are used.

Validation

• A 2-degree toe / 3-degree camber regression compared the existing FixedRotation degree API with the explicit-radian Frames.axesRotations path; maximum axis error was exactly zero.
• Stock VehicleSim output was byte-identical to main and reached QSS at 6.049508 s.
• This is behavior-preserving for existing BobLib data, not a runtime optimization or a correction of the current default results.