Break off cli into a self-contained binary

[samlaf]

Right now cli is tied to operator (it constructs an operator and uses it to register).
We should break off this cli into a self-contained binary, so that it can be reused by eigenDA and other teams.

[samlaf]

We're creating a bunch of tooling for AVS teams that use our registry contracts, which I feel is going to get out of hand. Feels like we should consolidate all of them in a single repo, basically the offchain equivalent of https://github.com/Layr-Labs/eigenlayer-middleware. We could call it eigenlayer-middleware-offchain or something. It would contain:

• AvsSync
• registration cli (already we've duplicated this code for eigenDA and inc-sq, we should consolidate)
• subgraphs to index the different contracts

[samlaf]

Closing in favor of newer #56