Align constraint usage with new constraint documentation (https://engibench.ethz.ch/development/problem_constraints/) - Airfoil @cashend - HeatConduction2D, 3D @MiladHB - Thermoelastic2D,3D @gapaza - Photonics @markfuge - Power Electronics @liangXD523
Align constraint usage with new constraint documentation (https://engibench.ethz.ch/development/problem_constraints/)