[Feature]: Engineering constants feature for anisotropic material

[nomiag9]

What are you trying to do and how would you want to do it differently?

I would like to request a feature for engineering constants type of material parameter for anisotropic materials so that, the user can directly write the values in MPa/GPa as in the current framework user has to calculate the values corresponding to Hooke's matrix.

Is it something you currently cannot do? Is this related to an issue/problem?

No response

Implementation details

No response

Would you be willing to submit a PR?

No

[JTHesse]

@CWillberg can you verify the changes.