Account e-invoice Generate

This module adds a company-level setting that decides whether an XML file is embedded in the PDF of customer invoices and credit notes, and in which format. You find it in the Accounting settings, under a new "Electronic Invoices" section, where a "Select Format" field lets you pick the XML format or "None". The value is stored per company, so companies with several legal entities can configure each one separately.

The module itself does not create any XML format; it only provides the choice and the logic that decides whether an XML can be generated. On account.move, it checks that a format is selected (not "None"), that the document is a customer invoice or customer credit note, that a customer is set, that the invoice is not cancelled, and that it has at least one real invoice line. Only then does it report the chosen format as usable; otherwise it returns nothing, so no XML is embedded.

It also defines the list of invoice report templates used for this purpose and a placeholder method get_payment_identifier meant to be completed by country-specific modules. The actual embedding of the XML is done by the companion UBL and Factur-X modules that build on this one.