Add verification scripts

[termi-official]

Verifications for the numerical implementation has to be added to make sure our simulations agree with other frameworks. Hence we want to reproduce following papers:

• Niederer Benchmark -> Simple EP verification
• The Effect of Modeling Assumptions on the ECG in Monodomain and Bidomain Simulations https://doi.org/10.1007/978-3-030-78710-3_48 -> ECG verification
• Simulation Methods and Validation Criteria for Modeling Cardiac Ventricular Electrophysiology https://doi.org/10.1371/journal.pone.0114494 -> Purkinje verification
• Model of Left Ventricular Contraction: Validation Criteria and Boundary Conditions https://doi.org/10.1007/978-3-030-21949-9_32 -> Contraction verification
• Land benchmark -> passive response verification
• Dynamics benchmark https://doi.org/10.1016/j.cma.2024.117485 -> dynamical response verification