Allow to create new Gnosis Safe accounts

[anxolin]

Create new safe command

yarn create-safe <file>

The input file for the safe could be:

{
    "seed": "main",
    "owners": [
           "0x1",  // The proposer should be here
           "0x2"
     ]
}

It will output the config you should use for your trades:

"account": {
    "accountType": "SAFE_WITH_EOA_PROPOSER",
    "seed": "main"
  }