[FIX] l10n_mx: add missing decorator on create method

Currently, if you install the Mexican localization, you are no longer
able to create  a new account in the chart of accounts.

Steps to reproduce
------------------
* install `l10n_mx`
* attempt to create a new account in the chart of accounts

You should be met with a traceback: `TypeError: AccountAccount.create()
missing 1 required positional argument: 'vals_list'`

Cause
-----
The `@api.model` and `@api.model_create_multi` decorators in indicate
that a method is intended to operate at the model level rather than on
specific record instances. Without these decorators, the system defaults
to treating methods as if they are meant to be executed on the record
level. This distinction significantly impacts how methods are invoked
through RPC.

In RPC scenarios, Odoo's default expectation for record-level methods is
that the RPC call will include the IDs of the records to which the
method applies, alongside any actual method arguments necessary for the
operation.

Here, `create()` is called through RPC, as a model-level method (i.e,
without record IDs). This makes sense because `create()` is always a
model-level method. However, in our case, create is a record-level
method, so the system expects the RPC call to contain record IDs. This
mismatch produces a traceback.

Issue introduced by 858bf9efdd9fcc29a73336863a51227c15cc19f0

opw-3772520
opw-3772469
opw-3772287
opw-3771854
opw-3771361

closes odoo/odoo#156163

X-original-commit: 59a49bda5607e8a12cf153c4338785de42cde90c
Signed-off-by: Brice Bartoletti (bib) <bib@odoo.com>

addons/l10n_mx/models/account_account.py

@@ -1,9 +1,10 @@
-from odoo import Command, models
+from odoo import api, Command, models
 
 
 class AccountAccount(models.Model):
     _inherit = 'account.account'
 
+    @api.model_create_multi
     def create(self, vals_list):
         # EXTENDS account - ensure there is a tag on created MX accounts
         # The computation is a bit naive and might not be correct in all cases.