[IMP] sale: enhance product listing and display on sales/purchase forms

[ksoz-odoo]

This commit improves the user experience when selecting products on Sale Orders and Purchase Orders:

• In Sale Orders, prioritize displaying products already sold to the selected customer, sorted from most recent to oldest invoice. Other products are shown
  afterward in standard order.
• Display the last invoice date on the right side of the product card.
• Include forecasted quantity and on-hand quantity directly on the product card.
  If there's a difference, show it in red (-) or green (+), without using
  brackets.
• Apply the same sorting logic to Customer Invoices for consistency.
• Adjust the Kanban catalog layout to remove color tags and sort products by last
  bill in Purchase Orders.

[robodoo]