feat(sale): Add product search by supplier info

This commit introduces the `sale_product_supplierinfo_search` module, which allows users to search for products on sales order lines and in the global product catalog by using the vendor's product code or product name.

Key features:
- Overrides `_name_search` on `product.product` to extend search capabilities.
- Activates the extended search via a context key on the sales order line.
- Adds a user-friendly "Search in Vendor Info" filter to the main product search view.
- Modifies the search result display to include the vendor's product code for better user context.
- Includes comprehensive unit tests to validate the new functionality.
- Provides OCA-compliant documentation and demo data.

Author: google-labs-jules[bot]

sale_product_supplierinfo_search/views/sale_order_views.xml

@@ -11,7 +11,7 @@
         <field name="inherit_id" ref="sale.view_order_form" />
         <field name="arch" type="xml">
             <xpath
-                expr="//field[@name='order_line']/tree/field[@name='product_id']"
+                expr="//field[@name='order_line']//field[@name='product_id']"
                 position="attributes"
             >
                 <attribute