feat: modify errors response according to standard

[pawelTshDev]

Modify error response according to template:

"validation errors"
{
  errors: {
    "name": [
      "key1",
    ],
    "name.[0]": [
      "kay2",
    ]
  }
}

//"throw new Error"
{
  error: {
    code: "error.code",
    message?: "Message",
  }
}