Add MITC4 shell NLGEOM finite rotation support
MITC4 shell elements need finite-rotation nonlinear geometry support for static NLGEOM analysis.
This issue tracks the implementation and verification of MITC4 shell NLGEOM support.
Related branch: SG-Nishioka/FrontISTR:feature/mitc4-shell-nlgeom
Related GitHub PR: https://github.com/FrontISTR/FrontISTR/pull/14