`fields.Json` is introduced in v16. There are just few usage of it in standard
code. It's usually used via `widget="analytic_distribution"`. However, user may
add the field to list view via a Studio. To prevent errors, this commits adds
basic formatter for the field.
STEPS:
-In the Purchase app, add a new Menu based on the existing Model "Purchase Order Lines"
-In the list view of that new Menu, add the existing field "Analytic
-Distribution"
opw-3055926
closesodoo/odoo#109573
X-original-commit: d0621a2aec9cdc4bad348804fe5ada974b75f322
Signed-off-by: Bruno Boi (boi) <boi@odoo.com>