[ADD] sales_products_kit: add functionality to sell products as a kit in Sales

[tshe-odoo]

• Added a new "Is Kit" button to the product page for kit selection.
• If the product is a kit, sub-products can be selected in the order line.
• Introduced a wizard to adjust the quantity and price of sub-products.
• On confirmation, sub-products are added to the order line with price set to 0, and costs are moved to the parent product.
• Sub-products are automatically deleted if the parent product is removed.
• Added a "Print in Report?" boolean to control visibility of sub-products in reports and customer preview page.

task id :- 5098017

[robodoo]