v2.4.0: Add Python/CuPy API

Move files, Makefile at top level and java code in java/
NVCC_ARCH is assignable in the Makefile
Demote kCachePointerWidth from __constant__ to a local variable
Remove documentation support for K80 and using older cuda from Docker
Corrections to the Apptainer definition files
Lint and format cuda code

v2.3.0

Add option for numThreads in both CLI and GUI

v2.2.0

Add command line interface and apptainer definition files

v2.1.1

Updated README with optional libs