Currently all the countries that match between odoo and AFIP list where
set with the respective value.
This commit add the AFIP code field to both tree (for consult) and form
view (in developer mode only) to let the user the posibility to set/edit this
field for any of the next cases:
* need to consult the code.
* need to be changed.
* need to create a new country that exist in AFIP list and not in odoo
and need to add the related AFIP code
closesodoo/odoo#40532
X-original-commit: 1b95bfe202576583d6458c6bd1a707dd988e6d95
Signed-off-by: Josse Colpaert <jco@openerp.com>