Add Cairo lang and OZ Contracts versions to generated contracts about contracts-wizard

[martriay]

Specific version > no version

[ericglau]

For Solidity, we plan to convey semantic versioning for the OZ Contracts version like this:

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.0.0
pragma solidity ^0.8.20;

@martriay @ericnordelo @andrew-fleming For Cairo, does it make sense to also convey semantic versioning for Cairo lang itself? For example, something like:

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts for Cairo ^0.8.0
// Cairo lang ^2.3.1

(or // Cairo compiler ^2.3.1)

[martriay]

Looks good! Although I'd be very specific with the versions since Cairo is introducing breaking changes even in minor releases. We cannot guarantee compatibility with any future version.

[ericglau]

@martriay In that case we should either do // Cairo lang 2.3.1 for a specific version (which is slightly misleading if it does work with a newer version of Cairo), or omit the Cairo version. Which would you suggest?