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