[Feature Request] Kolmogorov-Smirnov test

[omaus]

Is your feature request related to a problem? Please describe. Atm., a Kolmogorov-Smirnov test is missing, for both the two sample test and the goodness-of-fit test.

Describe the solution you'd like Implement such tests.

Describe alternatives you've considered None.

Additional context Be mindful of #89