Add kwargs to workflows

[nvaytet]

Add kwargs to workflows in case we want to use things like on-the-fly tof lookup table generation, as in

wf = time_of_flight.GenericTofWorkflow(
    tof_lut_provider=time_of_flight.TofLutProvider.TOF,
    run_types=[SampleRun],
    monitor_types=[],
)

[jl-wynen]

Can you turn GenericTofWorkflow into a :func: link? That would make it easier to look up the allowed params.