reimplement MR

.gitlab-ci.yml

applications/c8_air_shower.cpp

corsika/detail/framework/core/Cascade.inl

corsika/detail/modules/writers/InteractionWriter.inl

corsika/framework/core/Cascade.hpp

corsika/modules/writers/EnergyLossWriter.hpp

corsika/modules/writers/InteractionWriter.hpp

corsika/output/OutputManager.hpp

python/corsika/io/outputs/__init__.py

python/corsika/io/outputs/interaction.py

python/examples/first_interactions.py

tests/framework/testCascade.cpp

tests/output/CMakeLists.txt

tests/output/testInteractionWriter.cpp