[TASK] Handle `ResourceIdUpdate` Proposal

[shekohex]

Overview

In Our protocol we can add new handlers overtime on the same chain that all connected to one Signature Bridge contract. Adding a new Resource to the Signature bridge is handled through our proposal system using the webb_proposals::evm::ResourceIdUpdateProposal and it is treated differently since the proposal is executed on the Signature Bridge contract itself not on IExecutor handler.

Task Checklist

• [x] Check if the signed proposal's function signature matches adminSetResourceWithSignature(bytes32,bytes4,uint32,bytes32,address,bytes)
• [x] If so, Construct the call to adminSetResourceWithSignature
• [x] Add test for adding a new handler to the signature bridge contract.
• [ ] Update the docs (if needed)