Remove unnecessary dependencies

[mpvanderschelling]

The problem

The package has some dependencies that are not part of the functionalities of the code:

• matplotlib: there is no need to put this as a dependency, since there is not plotting functionality in f3dasm
• salib: this should not be part of the core package, but an implemented port to a sampling library (just as optuna)
• scipy: same as salib, but for an optimizer

To think about:
do we need xarray dependency?
can hydra be optional?