BEHAVIOR: define progress bar through callback

[redeboer]

The progress bars in the Minuit2 and ScipyMinimizer have been disabled by default. To enable, use a progress bar callback:

from tensorwaves.optimizer.callbacks import RichProgressBar

optimizer = Minuit2(callback=RichProgressBar())

or, to stack multiple callbacks,

from tensorwaves.optimizer.callbacks import CallbackList, CSVSummary, TqdmProgressBar

optimizer = Minuit2(
    callback=CallbackList([
        CSVSummary("traceback.csv"),
        TqdmProgressBar(),
    ]),
)

Tested on https://github.com/ComPWA/jpsi-nstar/pull/384