lloda/ra-ra: A C++20 array and expression template library with some J/APL features @ view2

lloda a67665fbf4 Rename extensions from .C .H to .cc to .hh		4 lat temu
..
FindCBLAS.cmake	e789f7e2d7 Support CMake for building tests, examples	5 lat temu
cc.cmake	a67665fbf4 Rename extensions from .C .H to .cc to .hh	4 lat temu
config.guess	a67665fbf4 Rename extensions from .C .H to .cc to .hh	4 lat temu
ra.py	a67665fbf4 Rename extensions from .C .H to .cc to .hh	4 lat temu