Adapted plotting functions to work without cistopic object.

[SeppeDeWinter]

No description provided.

[SeppeDeWinter]

@DadaAb Thanks for the changes.

Looks good, one small comment.

[SeppeDeWinter]

Using a list as default can cause unexpected results
See: https://docs.python-guide.org/writing/gotchas/

Better to use

def find_clusters(
    ...,
    res: list[float] | None  = None,
    ...
)

and in the function body

if res is None:
   res = [0.6]