Benchmarks

[dario-coscia]

Is your feature request related to a problem? Please describe. Create a benchmark folder for PINNs and NOs literature benchmarks, to easily try new PINNs and NOs variants.

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered PDE Bench seems a nice repo, but the compatibility for PINA is not easy, also it is hard to compare directly PINA problems to their simulations.

Additional context See #284

[dario-coscia]

@guglielmopadula and @AleDinve What do you think about working together on this project?