IB Support Through UCX

Hi @jgunthorpe,

I came across this library only recently and wanted to make you aware of a separate effort to provide RDMA support for Python users.  A number of us have worked to add Python wrappers for UCX (https://ucx-py.readthedocs.io/) which provides RDMA and GPURDMA transport.  My guess is that these projects serve different users -- still, wanted to make you generally aware