Use pybind as the "python binder" for pyeverybeam (formerly: pystationresponse)

Use pybind as the python binder for pyeverybeam (formerly known as pystationresponse, see https://git.astron.nl/RD/EveryBeam/-/blob/master/pystationresponse.cc). This seems to involve two tasks:

• Migrate from boost to pybind
• Do the actual binding and test for this (right now, it seems that the binding is actually not even compiled @tol?)