Expose singularity error level to public api

[fekazar]

Some computations are not possible (although they should be) because default singularityErrorLevel is too high. Why isn't this parameter public, how to make this threshold lower? For example, Apache Common Math api has overloaded methods to explicitly set the singularity threshold.

[devcrocod]

Thank you for the feedback. We have a common API with two primary computational engines underneath: one based on Kotlin and the other on native lib. In Kotlin, we can easily add the ability to change the singularityErrorLevel, but for the native-based engine, we need to investigate whether OpenBLAS allows for this modification.