Computation times

12:52.386 total execution time for 5 files from examplespreprocessor:

Example	Time	Mem (MB)
Create a full-heart model (preprocess-fullheart.py)	08:27.824	0.0
Generate atrial fibers (compute-atrial-fibers_pr.py)	03:26.025	0.0
Full-heart conduction system example (user_conduction_system_pr.py)	00:36.569	0.0
Download a PyAnsys Heart-compatible case from Zenodo (download-case_pr.py)	00:14.486	0.0
Define materials (demo-material_pr.py)	00:07.483	0.0