Support pagination when searching customers with admin rest api

[Klem3n]

Overview/summary

When using the search method for customers in the Shopify Admin API (as provided by the @shopify/shopify-api library), the method returns only response.body, which includes the customer data. However, it does not provide access to the page_info (Link) or any pagination-related information in the response, making it challenging to implement pagination for customer search results.

[matteodepalo]

Hi @Klem3n, thank you for opening this issue. We've put it in our backlog and will report back when we have a fix.