This commit adds functionality to parse FPL messages in the `aftn_parser.go` file. The `Parse` method now correctly parses the FPL message type and extracts the relevant data fields. The `FPL` struct is introduced in the `domain` package to represent FPL messages. The parsing logic is implemented to populate the `FPL` struct with the parsed data. This change enables the application to handle FPL messages and process them accordingly.
windyboy
afd4643696