Doxygen (C++) docs

The Doxygen documentation for Adaptyst is available at adaptyst-doxygen.docs.cern.ch. It is not fully complete yet, so please bear with us :)

This does not include the Python scripts used by the patched “perf” (i.e. the ones inside src/scripts in the source code tree). Please consult the files themselves along with the perf-script-python(1) man page instead. However, you should note that the patched-“perf”-based-arrangement (including the Python scripts) will be eventually replaced by an in-house equivalent as mentioned in our roadmap.