[Enhancement] triggers and filters updated

[Quuantum-Studios]

New javascript triggers added for payment flow and popup
Purpose/use-cases:

• This will help the developers (who want to build addons on top of this plugin) to have more control over the payment popup to update it's content or to do any other process in between the different steps in the popup.

Filter upiwc_capture_payment_order_status updated
Purpose/use-cases:

• This will help developers to have a filter argument to change the final order status conditionally. At present the filter just provides the order status to be modified, which limits it's capability to change the order status based on other attributes (which can be custom data managed by other addons) of an order.