Feature: list supported models

[pietrushnic]

It may be helpful to list supported models with some descriptions. Currently, models are hidden behind the scenes in configs, of which the user is unaware. However, as reported in #86, the model can impact how osfv-cli interacts with hardware.

[macpijan]

Models are currently loaded here: https://github.com/Dasharo/osfv-scripts/blob/main/osfv_cli/src/osfv/libs/rte.py#L49C9-L49C24

We can probably propose another file in libs/ that would allow us to get a list of available models and expose this as a new command in CLI.