Remove resolveReferencesRecursively() and initAfterReadRecursively() from PdmDocument::readFile(). These functions will be called in RiaApplication::loadProject after the file paths modifications are done. This will ensure that file paths can be used in initAfterRead() functions.
* 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