Refactor zone handling & validate invoice code

Completely removed Zone from TaxID and all definitions.
MX: zone field has been moved to mx-cfdi-post-code extension, with auto-migration.
CO: zone has moved to co-dian-municipality extension
PT: zone has moved to tax tags: azores and madeira
ES: zone has moved to specific ticketbai and facturae tags that provide validation.
Invoice Series and Codes now have a specific regular expression to prevent poorly formatted codes.
IT: now has list of correction types.
IT: zones removed as they were not used.
More tests around tax.KeyDefinition.

invopop / gobl