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.

test/iban_ex_validator_test.exs

@@ -106,7 +106,7 @@ test "Check Account number format negative cases" do
       # shorter then need and has
       # invalid characters (leters) in number
       {"BR18003603050000100097CC1", true},
-      {"CR050152020010262806Ї", true},
+      {"CR050152020010262806Ї", true}
       # FIXME it is invalid IBAN for Bulgaria — need to change a rules function in Country Template module
       # {"BG80BNBG9661102034567Ї", true},
     ]