* Refactor interface to PdmObjectHandle and PdmFieldHandle Return objects instead of passing in structures as parameters * Add nodiscard to several functions * Remove redundant this-> * Rename to ptrReferencedObjectsByType
* Set column width to 140 * Use c++20 * Remove redundant virtual
* Rearrange intersection classes, split single file into one-per-class * Support multi-part geomech case intersections