Product Simple Seasonality

This module adds a simple, informative way to label products with seasons. It creates a new "Seasonality" record with a name and a company, which you manage from a dedicated menu.

• A new "Seasonality" menu appears under Odoo's custom menu area, with a list and form to create, view and search seasons.
• On the product form, a "Seasonality" field is added in the sales/upsell group, where you can pick one or more seasons using tags.
• On the packaging form, the same seasonality tags are shown after the barcode field; they are not entered there but are taken automatically from the related product, so they stay consistent.
• The field is purely informative: it does not change prices, availability, stock or sales rules, and no automatic checks or emails are triggered.

Access is controlled: administrators (settings group) can create, edit and delete seasons, while regular users can only read them. The module touches the product template and product packaging screens and adds the new seasonality model.