Interface to SCIP solver

[CROdominik]

Could it be possible to add SCIP solver interface to the implementation roadmap? https://www.scipopt.org/

SCIP is a very powerful NON COMMERCIAL solver for mixed integer programming. Recently, some researchers achieved big improvements on MILP problems solving by using SCIP for pressolve and highs for further solve. As both as non commercial solvers, it would be very powerful that this combination can be utilized through linopy directly.

There is a python library for building optimization models and solving using SCIP which could help out here: https://github.com/scipopt/PySCIPOpt