added new features:

- bump version to 0.2.0
- updated README.md
- added and updated several tests
- added and updated doc
- updated sample_extractor and added sample_executor
- added clang-format specification
- added support for sanitizers
- added more exhaustive gitlab-pipeline
- added more specific exceptions
- updated help-message generation in parsers (sub_parser, main_parser and basic_parser)
- minor improvements of CMakeLists.txt (e.g. added cppcheck)
- renamed full_example to large_example
- minor improvements to examples
- added test examples scripts
- added build_info_string
- unified arguments and options