A Perfect Smoother

I'm proud to present the first Rust implementation of the Whittaker smoother, which is known as the perfect smoother due to its ability to fit a discrete time version of a spline, meaning the smoothed function has a smooth p-th order derivative as well.
I'm genuinely suprised how little this beautiful algorithm is know given its awesome properties. There is not even a Wikipedia page for it, which I may have to change in the future.
Anyways, hope this is useful to you!