Simplified Option to Send Pre-Order Shipping Updates to Customers from preorder offer page

Add a simple button on the pre-order offer page that allows us to quickly send shipping updates to all customers who placed a pre-order, or to selected customers based on the product within the pre-order. The current process is time-consuming, and a more direct option would improve efficiency.

Additionally, improve the Pre-Order Shipping Update Email formatting to include:

• Arrival updates and changes

• Suggestions for complementary items that go well with the customer's upcoming order

• Information about other upcoming pre-order items arriving at the same time

• Updates about shipping delays, factory holidays, material shortages, or changes in shipping vessel schedules
  

Also, integrate the shipping update feature with platforms like Shopify Email and Klaviyo to allow us to manage and send updates more easily through their existing email marketing tools.