chore: remove compiled assets

[brech1]

Description

This PR removes compiled assets and adds them to the .gitignore file. This leaves only the AttestationStation.sol as input.

The deploy_as function was updated to remove the abigen macro, since this wouldn't allow to delete the contract ABI, the project wouldn't compile.

The commands functionality has been updated:

• compile: Generates and stores the AttestationStation rust bindings.
• deploy: Compiles and deploys the AttestationStation.sol contract.

Related Issues

• Resolves #254

Changes

• Removed assets and update .gitignore.
• Update deploy_as function.
• Move data folder to the client crate and rename to assets.
• Update .gitignore
• Adjust compile and deploy functions.
• Remove unused fs.rs utils.
• Remove all code related to the verifier.