couldn't compile for cuda 11 using complex, needed to move to cuComplex

change formatting of code

start to adjust header definition for alpaca but ended up more with
todo's and notes to try and understand what to do in moving from flag to
onr to alpaca and be more flexible/standalone

flag beamformer library has always been part of a larger project, this
strips that down to a separate repo and removing much of the other
baggage

additionally, a lot of changes have been made to adjust flag to onr but
we need now need the beamformer to look more like flag and there was no
tag or real commit to revert back