I have implemented rational reconstruct over a generic univariate polynomial ring.

I'm not sure if I put in the right place, if not, please let me know.

Component: commutative algebra

Keywords: sd87, days88

Author: Edgar Costa

Branch/Commit: f392803

Reviewer: Aly Deines, Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/23534