feat: add dill import

Author: rabii-chaarani

FoldOptLib/__init__.py

@@ -1,10 +1,4 @@
-# from .fold_modelling import FoldModel, BaseFoldFrameBuilder
-from .helper import _helper, utils
-from .input import CheckInputData, InputDataProcessor
-from .objective_functions import GeologicalKnowledgeFunctions, VonMisesFisher, LeastSquaresFunctions, \
-    loglikelihood_fourier_series, loglikelihood_axial_surface, gaussian_log_likelihood, loglikelihood, \
-    is_axial_plane_compatible
-from .optimisers import FourierSeriesOptimiser, AxialSurfaceOptimiser
-from .splot import SPlotProcessor
-from .ipywidgets_interface import create_value_widgets, on_add_button_click, on_constraint_change, \
-    on_sub_constraint_change, display_dict_selection
+"""FoldOptLib package."""
+from .version import __version__
+
+__all__ = ["__version__"]

FoldOptLib/fold_modelling_plugin/__init__.py

@@ -0,0 +1,3 @@
+"""Compatibility layer for historical `FoldOptLib.fold_modelling_plugin` imports."""
+
+__all__ = []

FoldOptLib/fold_modelling_plugin/helper/__init__.py

@@ -0,0 +1 @@
+from .utils import *  # noqa: F401,F403 - re-export utilities