Several backend changes to simplify kwargs propagation to and from windFarmModel

.gitignore

docs/notebooks/EngineeringWindFarmModels.ipynb

docs/notebooks/Site.ipynb

docs/notebooks/gradients_parallellization.ipynb

py_wake/aep_calculator.py

py_wake/deficit_models/deficit_model.py

py_wake/deficit_models/fuga.py

py_wake/deficit_models/gaussian.py

py_wake/deficit_models/hybridinduction.py

py_wake/deficit_models/noj.py

py_wake/deficit_models/rankinehalfbody.py

py_wake/deficit_models/rathmann.py

py_wake/deficit_models/vortexdipole.py

py_wake/deflection_models/deflection_model.py

py_wake/deflection_models/fuga_deflection.py

py_wake/deflection_models/gcl_hill_vortex.py

py_wake/deflection_models/jimenez.py

...ake/examples/data/dtu10mw_surrogate/_dtu10mw_surrogate.py

py_wake/examples/iea37_example.py

py_wake/flow_map.py