Generate Cart & Checkout Links for WooCommerce

Description:
Currently, when generating an instant checkout URL, it’s possible to select specific products or categories and then define a quantity. However, the defined quantity applies to all selected products equally.

Requested Feature:
When the option “Specific products” is selected, I would like the ability to define a separate quantity per product.

Example Use Case:

Product A → Quantity: 1

Product B → Quantity: 3

Product C → Quantity: 2

At the moment, if I set quantity = 2, all products in the checkout URL will have quantity 2, which limits flexibility.

Benefit:
This feature would allow for more granular control and make the plugin more versatile for use cases like pre-configured bundles, promotional links, or multi-product instant checkouts.