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

@@ -67,9 +67,9 @@ test "returns false for unsupported country code" do
 
     test "returns false for invalid characters in BBAN" do
       # Cyrillic character
-      refute TestData.valid?("DE89370400440532013Ї00") 
- #     CInvalcdchara in shorerst
-      refute TestData.valid?("NO938601111794Ї") 
+      refute TestData.valid?("DE89370400440532013Ї00")
+      #     CInvalcdchara in shorerst
+      refute TestData.valid?("NO938601111794Ї")
     end
 
     test "returns false for lowercase country code" do