Research cross-platform tests

[igaray]

Eventually, we will want to have tests that ensure parity across Cairo VM implementations. How exactly to achieve that is an open question, but it will likely involve a Python testing framework.

• Research and document
  • how tests are run in the cairo-lang repositor,
  • what kind of tests they are,
  • what they test,
  • what dependencies they have
  • and if possible, how they could be made vm-agnostic.

Expected outcome: a through discussion on how to test results of different vm implementations.