ADD IBAN FIELD TO STRUCTS AND UPDATE PARSING LOGIC

- Added `iban` field to the `IbanEx.Iban` struct to hold the full IBAN value. - Updated the parsing logic to populate
the new field. - Adjusted BBAN rules and tests for France and Brazil to reflect updated structures. - Improved error
handling and format validation routines.

lib/iban_ex/commons/commons.ex

@@ -19,6 +19,7 @@ def normalize_and_slice(string, range) do
     string
     |> normalize()
     |> String.slice(range)
+
     # |> case do
     #   "" -> nil
     #   result -> result