Support Windows
Created by: wdphy16
This should be merged after we merge PhilipVinc/numba4jax#8 and tag a release, and I think also after #1112.
To support Windows, the most nasty thing is that the default size of some int is 32 bits rather than 64 bits, even on 64-bit Windows. (I didn't test it on 32-bit Windows, but come on it's 2022)
Also, we need to correctly find mpicc
because the default configuration of mpi4py
on Windows does not provide it.