cib-embedded-exaple with Modern C++

Notes:

1. Works with latest arm compiler with C++20 support. Tested with Arm GNU Toolchain arm-none-eabi v13.2 Rel1.
2. I couldn't find a way add cib (or any other repo) as dependency in Microchip Studio IDE. So, copied the requried files into lib directory.
3. The current code will turn on LED when Push Button is kept pressed.