[ccaprani]

Summary

• consolidate the standalone Plotly tutorial into a new visualisation tutorial
• add custom matplotlib examples for reordered result panels and deflection overlaid on a structure schematic
• remove the separate Plotly tutorial from the tutorial toctree

Verification

• executed docs/source/notebooks/visualisation.ipynb
• built docs locally with python -m sphinx -b html docs/source docs/_build/html

Note: local docs build still reports the pre-existing missing _static warning.