Create lib that uses Viem

[aguzmant103]

Viem is a lighter alternative to Ethers. This new lib can be part of the @semaphore-protocol/data package so that devs can choose what they prefer to use in their applications.

[inaridiy]

I worked on this PR. Check it out if you like.
#364

[cedoor]

Re-opening this issue again due to lack of activity.

[NexusGhost27]

I am interested in this task and can start asap. I can create PRs for the step by step migration.