This commits adds `account_peppol` module that allows: - Registering as an account edi user and send an application to the peppol proxy, where the participant can be approved or rejected after reviewing the documents attached. - Sending invoices by selecting 'Send via Peppol' option in the send & print wizard. - Receiving peppol documents. task-3159912 closes odoo/odoo#119120 Signed-off-by: Laurent Smet <las@odoo.com>