[haitao-ZCU]

Adds unit tests (do not need to run Ansys) for :

• barrier generation (get_arc, signed_distance, check_barrier), covering the OneLambda, SixLambdas, and 3BrokenLines generators
• rotation_matrix, rotate, and analyze_results
• objective_transform and init_points
• extract_results unit conversion (both motor1 and motor2)

[sadda]

@haitao-ZCU Have you checked (as mentioned in the issue)?

MANUALLY (that is without an AI agent) check whether all tests make sense. We had an example of a test confirming a bug.

[haitao-ZCU]

@sadda
Yes, I have manually checked the physical values and each test.