Support `zksolc link`

[Karrq]

Component

Forge

Describe the feature you would like

With #711, we now have partial support for unlinked contracts with zksolc, meaning we detect if a contract is unlinked and store it as such, preventing users from accidentally using said contracts in their deployments (which would be invalid).

There are some functions that we do not implement which make use of this distinction, for example, we do not handle the actual linkage done during test/scripts deployments, needed for #382.

Additional context

No response