libutils exception handling (utils::exception) - IException/AException, Error/Warning/None/Fatal/CustomException, InternalCode vs ExternalCode, Type, restrictions, formated() output, throw/catch/print patterns - and how to add new exception codes to a project (cmake/config/exceptions/*.json, generate_exception_header.py + const.py, CMake custom command, include/exception/generated_external_exception_header.hpp). Use whenever throwing, catching or printing a libutils exception, choosing an exception code, or adding/editing exception codes, the exception JSON config, the generator script or the generated_*_exception_header of a project.
