Add Modal Close Tracking Support

Problem Statement

Currently, there is no reliable way to track when users close a Pelcro modal, making it difficult to measure user interactions and modal abandonment.

User Story

As an integrator, I want a reliable way to detect when a Pelcro modal is closed so that I can accurately track user behavior and trigger custom analytics.

Definition of Done (DoD)

• Add a unique ID to the modal close button to support client-side tracking.

• Emit a pelcroModalClosed SDK event whenever a Pelcro modal is closed.

• Ensure the event is fired regardless of whether the modal is closed via the close button, Escape key, or clicking outside the modal (where applicable).

• Document the new ID and SDK event for developers.

• Verify the event is emitted consistently across all Pelcro modals.