Add warning when payment order is not SEPA

The field 'sepa' on account.payment.order is only display for SEPA
payment methods.
If the option "show warning if not SEPA" is enabled on the payment
method, a warning banner is now displayed on payment orders with a SEPA
payment method which are not SEPA.

account_banking_sepa_direct_debit/__manifest__.py

@@ -6,7 +6,7 @@
 {
     "name": "Account Banking SEPA Direct Debit",
     "summary": "Create SEPA files for Direct Debit",
-    "version": "16.0.1.0.1",
+    "version": "16.0.1.0.2",
     "license": "AGPL-3",
     "author": "Akretion, Tecnativa, Odoo Community Association (OCA)",
     "website": "https://github.com/OCA/bank-payment",

account_banking_sepa_direct_debit/data/account_payment_method.xml

@@ -7,5 +7,6 @@
         <field name="bank_account_required" eval="False" />
         <field name="mandate_required" eval="True" />
         <field name="pain_version">pain.008.001.02</field>
+        <field name="warn_not_sepa" eval="True" />
     </record>
 </odoo>

account_banking_sepa_direct_debit/migrations/16.0.1.0.2/post-migration.py

@@ -0,0 +1,11 @@
+# Copyright 2023 Akretion France (http://www.akretion.com/)
+# @author: Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openupgradelib import openupgrade
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    sct_method = env.ref("account_banking_sepa_direct_debit.sepa_direct_debit")
+    sct_method.write({"warn_not_sepa": True})