refactor: cleaning of using package/global defaults

[Borda]

While Working on the package, I found the default challenging to follow... I go that package want to have one global setting but as dist it hard to trace and eventually help with refactor by any IDE, so using dataclass would be better.

Also, for user, I think using default directly with the cashier would be much better, see additional suggestion

def cachier(
    hash_func: _Type_HashFunc = _default_hash_func,
    hash_params: Optional[_Type_HashFunc] = None,
    backend: _Type_Backend = "pickle",
    mongetter: Optional[_Type_Mongetter] = None,
    stale_after: datetime.timedelta = datetime.timedelta.max,
    next_time: bool = False,
    cache_dir: Union[str, os.PathLike] = "~/.cachier/",
    pickle_reload: bool = True,
    separate_files: bool = False,
    wait_for_calc_timeout: int = 0,
    allow_none: bool = False,
):
    ...

[Borda]

@shaypal5 mind checking it again? 🦩

[shaypal5]

Awesome work, man! Thank you for your contribution!