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
closesodoo/odoo#119120
Signed-off-by: Laurent Smet <las@odoo.com>
