Group the windows arguments into a single arguments

[hadware]

This is plea for grouping the three arguments that parameterize the windowing step into a single argument, that would take a SlidingWindow argument. This would greatly de-bloat some of the functions while retaining the same functionalities.

This SlidingWindow could be, for instance, a dataclass, with the same default parameters as already defined everywhere in the package:

# default values are the same as already defined in the functions headers
@dataclass
class SlidingWindow:
    length: float = 0.25
    hop: float = 0.10
    wtype : WindowType = "hamming" # bad idea to shadow "type" keyword

Each function making use of a sliding window could then be like this

def feat_fn(
    ...
    window : Optional[SlidingWindow] = None, 
    ...):
    ...
    if window is None:
         window = SlidingWindow()
    ...

What does @hbredin thinks of this?

[SuperKogito]

This looks nice and will lower the number of inputs in certain functions. I will include it in #46 later today :))