API change; functional approach to couple hyperparameters and optimizer choice

[mpvanderschelling]

It would probably be more intuitive to change the API access of optimizers to be a function call instead of a combination of hyperparamater (dict) and the optimizer name (string).

I could mimic the API of optax for this, so it would be something like this:

from f3dasm_optimize import adam
experiment_data.optimize(optimizer=adam(learning_rate=1e-3), data_generator=..., ...)