Drop old API format

[mdouchement]

Use:

• /v1/*
• /v2/*
• New error format

  {
    "meta": {
        "auth": {
            "userUuid": "452e3655-6f31-4bc6-8f99-ab24be85df3f",
            "roles": [
                {
                    "uuid": "8802d6a3-b97c-4b25-968a-8fb21c65c3a1",
                    "name": "CORE_USER"
                }
            ]
        },
        "server": {
            "filesServerUrl": "http://localhost:3125"
        }
    },
    "data": {
        "error": {
            "message": "The email you entered is already taken. Please try again."
        }
    }
  }

  meta can be ignored