Initial Beta: Sectional Analysis & OpenSees Bridge

This release implements a comprehensive suite for cross-sectional geometric and structural analysis. Key Features:

Structural Integration: Automated exporter for OpenSees .tcl environments.

Torsional Estimation: Implements a semi-empirical approximation for the torsional constant (J≈A4/40Ip​) to ensure numerical stability in 3D FEA models.

Advanced Properties: Calculation of principal axes, elastic section moduli, and statical moments via Gaussian Quadrature.