aron type visitor and converter updates

...I/libraries/aron/converter/json/NLohmannJSONConverter.cpp

...API/libraries/aron/converter/json/NLohmannJSONConverter.h

source/RobotAPI/libraries/aron/core/CMakeLists.txt

source/RobotAPI/libraries/aron/core/Descriptor.h

...e/RobotAPI/libraries/aron/core/data/converter/Converter.h

source/RobotAPI/libraries/aron/core/data/rw/Reader.h

source/RobotAPI/libraries/aron/core/data/rw/Writer.h

source/RobotAPI/libraries/aron/core/data/variant/Variant.h

...otAPI/libraries/aron/core/data/visitor/RecursiveVisitor.h

source/RobotAPI/libraries/aron/core/data/visitor/Visitor.h

...braries/aron/core/data/visitor/variant/VariantVisitor.cpp

...libraries/aron/core/data/visitor/variant/VariantVisitor.h

...RobotAPI/libraries/aron/core/type/converter/Converter.cpp

...e/RobotAPI/libraries/aron/core/type/converter/Converter.h

...ore/type/converter/nlohmannJSON/NlohmannJSONConverter.cpp

.../core/type/converter/nlohmannJSON/NlohmannJSONConverter.h

...ies/aron/core/type/converter/variant/VariantConverter.cpp

...aries/aron/core/type/converter/variant/VariantConverter.h

source/RobotAPI/libraries/aron/core/type/rw/Reader.h

source/RobotAPI/libraries/aron/core/type/rw/Writer.h