added the csv_logic to error handle better

[nesh170]

Errors:

• if invalid CSV file (not a CSV file or bad formatted Error 400 Response:

  {
  "detail": "This is not a valid CSV file, sorry"
  }

• if invalid CSV (bad data) Error 400: Returns the row number which returns an array where each key is the header name Response:

  {
  "1": [
      {
          "pokeball_25": "A valid number is required."
      }
  ],
  "2": [
      {
          "lit1233": "A valid integer is required."
      },
      {
          "pokeball_2": "A valid number is required."
      },
      {
          "lit-o-meter": "A valid integer is required."
      },
      {
          "pokeball": "A valid number is required."
      },
      {
          "pokeball_25": "A valid number is required."
      },
      {
          "pokeball_21": "A valid number is required."
      },
      {
          "pokeball_3": "A valid number is required."
      }
  ],
  "3": [
      {
          "quantity": "Ensure this value is greater than or equal to 0."
      }
  ],
  "4": [
      {
          "name": "item with this name already exists."
      }
  ]
  }