Array.array Type Codes are not platforminvariant.

The platform-specific type codes interpretations for array.array make it more complex to write python code that contains known type codes and data bytes and will run reliably on all platforms. In particular, the 'l' and 'L' codes are 4 bytes on Windows, but 8 bytes on macOS. The 'i' and 'I' codes seem to be 4 in both cases, but that is a convention, not a requirement. There should be 4-byte and 8-byte integer types that guarantee that size regardless of platform---perhaps '4' and '8' for signed, '5' and '9' for unsigned. (I haven't tested other type codes.) The documentation should be updated in the meantime.

Comienza rastreando el comportamiento de los códigos de tipo de array.array en distintas plataformas y revisando la documentación relacionada. Determina qué garantías sobre los códigos de tipo son viables sin romper las convenciones existentes; se considerará terminado cuando los códigos compatibles tengan tamaños documentados de forma coherente y la documentación explique las diferencias entre plataformas o las nuevas garantías.