Re-work dependencies

[fcooper8472]

Drop requirement of numpy < 2

• This should now be supported thanks to the latest release of PyTables

Use PyTorch nightly for tensor-enhanced macOS

Equivalent of

pip3 install --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cpu

Make bitsandbytes a dependency only for Linux

Only required for cuda-specific computations in the PyTorch code