pyln-client is too difficult to install in some kind or architecture

[vincenzopalazzo]

See for more context rustyrussell/lnprototest#128

IMHO this should not be so painful to install for a library that it is providing just a way to interact with an unix socket.

If we should add additional feature for interacting with other kind of API, we should make different package that are depending from pyln-client if it is necessary/