Merge branch 'lineplots' into 'main'

...mples/howto_conversions/plot_D_feflowlib_CT_simulation.py

...amples/howto_conversions/plot_E_feflowlib_H_simulation.py

docs/examples/howto_plot/plot_animation.py

docs/examples/howto_plot/plot_contourf_2d.py

docs/examples/howto_plot/plot_observation_points.py

docs/examples/howto_plot/plot_shared_axes.py

docs/examples/howto_plot/plot_timeslice.py

docs/examples/howto_plot/plot_with_custom_fig_ax.py

docs/examples/howto_postprocessing/plot_aggregate.py

docs/examples/howto_postprocessing/plot_calculate_diff.py

...to_postprocessing/plot_convergence_study_nuclear_decay.py

docs/examples/howto_postprocessing/plot_sample_mesh_line.py

docs/examples/howto_preprocessing/plot_remeshing.py

docs/examples/howto_prjfile/plot_manipulation.py

docs/examples/howto_quickstart/plot_meshseries.py

docs/examples/howto_simulation/plot_100_logparser_intro.py

.../examples/howto_simulation/plot_102_logparser_advanced.py

docs/releases/ogstools-0.x.md

ogstools/definitions.py

ogstools/examples/__init__.py