.gitlab-ci.yml: removed ninja-builds from clang-tidy-builds and added clang-tidy-11 and clang-tidy-14

Added new architectures and OSs:
- includes amd64 (debian 10, ubuntu 20.04, ubuntu 21.04)
- includes arm64 (debian 10, ubuntu 20.04, ubuntu 21.04)
- includes armhf (debian 10)

- 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

- new exceptions based on clapp::exception::clapp_exception.
- added `parse_and_validate()` function.
- added found-func
- added help-option
- added more constexpr
- added more comments to examples
- code cleanup
- bump version t0 0.1.0
- added gitlab-ci pipeline
- added double/float values
- added support for vector of short/long options
- added doc-extractor