Georgia IBAN parsing rules

Examples

    iex>  %IbanEx.Iban{
    ...>    country_code: "GE",
    ...>    check_digits: "29",
    ...>    bank_code: "NB",
    ...>    branch_code: nil,
    ...>    national_check: nil,
    ...>    account_number: "0000000101904917"
    ...>  }
    ...>  |> IbanEx.Country.GE.to_string()
    "GE 29 NB 0000000101904917"