Add nonlinear and evolutionary methods for solver

Imported from UserVoice

Author: Matej Kalinic

Hello,

Currently, the Solver in ONLYOFFICE Spreadsheet Editor only supports the Simplex LP
(linear) method. Adding nonlinear methods (such as GRG Nonlinear) and evolutionary
algorithms — as available in Excel’s Solver — is already on our development roadmap(track number — 80810).

We’ll update this thread once there’s progress to share.