Implemented 3D connected components as wrapper class for scipy.ndimage.label

Ticket: https://www.notion.so/qim-dtu/3D-connected-components-ca5c410fef49444eac7c6efd0b56ead4?pvs=4

I have made a simple plot functions that takes the ConnectedComponents object and extracts the connected_components volume.

However I don't know if it is necessary as the user could do this manually.

def plot_connected_components(connected_components: ConnectedComponents, **kwargs):
    """ Plots connected components from the ConnectedComponents class as 2d slices.

    Args:
        connected_components (ConnectedComponents): The connected components class from the qim3d.utils.connected_components module.
        **kwargs: Additional keyword arguments to pass to qim3d.viz.img.slice_viz.

    Returns:
        matplotlib.pyplot: the 3D plot of the connected components.
    """
    fig = slice_viz(connected_components.connected_components, **kwargs)
    return fig

qim3d/utils/__init__.py

-from . import internal_tools
-from .models import train_model, model_summary, inference
-from .augmentations import Augmentation
-from .data import Dataset, prepare_datasets, prepare_dataloaders
 #from .doi import get_bibtex, get_reference
-from . import doi
-from .system import Memory
\ No newline at end of file
+from . import doi, internal_tools
+from .augmentations import Augmentation
+from .cc import get_3d_cc
+from .data import Dataset, prepare_dataloaders, prepare_datasets
+from .models import inference, model_summary, train_model
+from .system import Memory