fix: Forward impression events and products instead of null events

[mmustafa-tse]

Summary

A customer reported that Impression events sent from React Native SDK are being received as null in the UI, after further investigation it seems the iOS react native bridge was missing the logic to handle impressions in logCommerceEvents.

Testing Plan

Tested E2E by changing the code locally:

Master Issue

Closes https://rokt.atlassian.net/browse/SDKE-1210

[cursor]

PR Summary

Low Risk
Localized bridge mapping for analytics commerce impressions; no auth, persistence, or API contract changes beyond fixing dropped impression data on the New Arch iOS path.

Overview
Fixes impression commerce events from React Native on iOS showing as null in the dashboard by mapping commerceEvent.impressions() in the New Architecture logCommerceEvent bridge.

When impressions are present, each list’s impressionListName and nested products are converted with the same field mapping as regular products (createMPProductFromDict), then attached via addImpression:product listName: before the event is logged. Impression lists without a list name are skipped.

This aligns the Turbo Module path with the existing old architecture RCTConvert (MPCommerceEvent) impression handling, which was already implemented but not wired in the struct-based New Arch method.

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