Allow Multiple Product ID in Transaction Created w Product Trigger

Add the ability to input multiple product IDs in a single Zap, instead of having to create a unique Zap for each product ID. This feature should support various separators, like commas or spaces, to differentiate between different product IDs.

**An example use case for this is:**

This feature would be extremely beneficial for users who manage a large number of product IDs within Ontraport. For instance, a user runs an e-commerce business with over 500 different products. Each time an order is placed for any of these products, they want a Zap to trigger and send the order details to another application (e.g., Shipstation for fulfillment). Without the ability to input multiple product IDs in a single Zap, they'd need to create 500 separate Zaps, which is not practical or efficient.

This enhancement would greatly improve the user experience in managing high volume product workflows and would reduce the need for numerous redundant Zaps.