Add Feature to Allow Multiple Tracking Numbers to post to Shopify by Carton and SKU Level

Currently, Cin7 only allows for 1 tracking number to be fed back to Shopify. Our orders may ship in multiple cartons with different carriers since our 3PL uses a rate logic to ship with the least expensive option. I would love to be able to keep the ability to ship with multiple carriers and post tracking numbers by the carton or SKU level.