Raise error when `center_line` is not perpendicular to the transducer direction for 3D phased arrays

[d-lucena]

Describe the new feature or enhancement

An error should be raised with an explanation on how to make the center_line perpendicular to the transducer direction.

Currently if the user inputs a center_line that's not perpendicular to the direction a warning is raised and center_line is projected to the plane perpendicular to the direction of the transducer (not explicit to the user).

• we should raise a warning if the center_line is close enough to perpendicular (e.g. 1 or 5 degrees)
  • an error should be raised if more than the threshold
• show user how to project the line to the correct plane if they want