Add debugger tool for evm_arithmetization's CPU

[Nashtare]

When debugging a prover failure, we can use eth-trie-tools for tries discrepancies, but we don't have anything to go through the actual EVM execution, and we usually need to rely on manual investigation.

Something that should be relatively simple to implement would be to parse both a zkEVM log file and the related txn execution trace counterpart (obtained via the usual debug_traceTransaction), and compare at least for each zkEVM Syscall the pre and post stack (ignoring on the zkEVM side the top element always being KEXIT_INFO), and outputting the first discrepancy if any.

Parsing the output of debug_traceTransaction JSON file is straightforward. On the zkEVM side, the pre stack of any Syscall is always on a line with pc=sys_xxx, where xxx is the instruction to be matching on the other side. The post stack can be found by looking at the first line below containing below sys_xxx, instruction=ExitKernel. We don't expose the stack for basic operations like POP, PUSH, ... so we would filter these out when going through the actual EVM trace for comparison.