No MPI Single Process Support

[ncollier]

Single process support may be possible with proxy MPI import -

import repast4py_mpi_proxy as mpi4py

where the proxy doesn't do anything but provides enough so a single process model runs without mpi.

C++ side will be harder but may be possible through conditional includes and some proxy C++ code.

[ncollier]

Initial implementation is here: cdd349a

[ncollier]

• Pyproject.toml (optional build dependencies)
• Update docs with install options
• Update tox config for both default and mock mpi options

pyproject.toml contains mpi4py in the build dependencies -- any way to make this optional

[ncollier]

RC candidate: e94a656