add script to calculate RDT from tracking data

[mihofer]

complementary to metaclass/opticsclass, create script which takes PTC trackone data and returns processed RDTs

compared to omc3 RDT reconstruction, no px reconstruction necessary

[fsoubelet]

This should be closed as we have that functionality in optics_functions. Do you confirm @mihofer?

[mihofer]

This should be closed as we have that functionality in optics_functions. Do you confirm @mihofer?

should be definitely moved to optics_functions, but I am not sure if it can be closed.
The idea was to use x and p_x from tracking data to reconstruct h_x,- and then use this as input for FFT and RDT reconstruction.
In OMC3 and BB.src, the h_x,- reconstruction is done using the x data from two locations to get the p_x, which is the only option in experiment, but also has its drawbacks.
The optics_functions implementation on the other hand doesn't use tracking data but rather the phase advance and strength of the elements in the twiss file to reconstruct the (first order) RDTs.
The applicability of this script is probably very limited, but might help in some simulation cases.

[mihofer]

But PTC trackrdt would probably work in 90% of the cases too (cases with coupling on the other hand ...).