[Upd] standardization of some files

Context

Change some files to apply Aidge C++ standards like no end-of-line spaces, precompilation directoves following the path of the file, include what you use and only what you use

Major modifications

• Standardize #ifndef preprocessor directives in many files
• remove some unused includes and add used includes
• remove end-of-line spaces
• add doxygen to DoReFa.hpp
• add log to CLE.cpp
• move functions from hpp to cpp file in DoReFa, FixedQ and TanhClamp operators
• change size_t for std::size_t