Common sensor library
Doxygen'd, clang-formatted, provide one example, and actions CI
thanks @madhephaestus https://github.com/adafruit/Adafruit_BNO055/issues/58#issuecomment-471546460
Removed .cpp file as it's unused and has an unnecessary reference on avr/pgmspace.h (which caused problems on non-AVR platforms).
Sync current repository state with Arduino library manager.
Initial release for the Arduino library system.