feat(l2): info command

[fborello-lambda]

Motivation

Implement the info command for the ethrex_l2 cli.
When we edit the config it's being displayed always, don't display by default, add a flag -s to display the changed config.

Description

-s flag example:
Show the changes(note the -s):

ethrex_l2 config edit -s

Info command:

❯ ethrex_l2 info --help
Gets L2's information.

Usage: ethrex_l2 info <COMMAND>

Commands:
  latest-blocks, -l  Get latestCommittedBlock and latestVerifiedBlock from the OnChainProposer.
  block-number, -b   Get the current block_number.
  transaction, -t    Get the transaction's info

[ilitteri]

LGTM