chore(test): e2e test-tabs-events

[LKuchno]

Description

Updates the test screen component and manual scenario. Adds a Detox suite for tab lifecycle events - onWillAppear, onDidAppear, onWillDisappear, onDidDisappear. Events are surfaced as numbered, color-coded toasts so that both firing order and identity can be asserted programmatically.

Closes: https://github.com/software-mansion/react-native-screens-labs/issues/1123?issue=software-mansion%7Creact-native-screens-labs%7C1183

Changes

e2e/single-feature-tests/tabs/test-tabs-events.e2e.ts
Detox suite with 5 it blocks. A shared dismissToast helper waits for a toast by label and taps it. Toast labels carry numeric prefixes (1. TabA: onWillAppear) so assertions are order-sensitive. Event order assertions are branched by device.getPlatform() to account for the differing iOS / Android firing sequence. The re-tap test is Android only.

test-tabs-events/index.tsx
Added tabBarItemTestID to each route config (tab-a-item, tab-b-item, tab-c-item) so tab bar items are directly addressable by the E2E suite. Added testID to the content container of TabScreen, keyed by route as tabContent-{routeKey}, used to assert which tab is currently visible.

test-tabs-events/scenario.md
Updated E2E status from "ongoing research" to "partially automated" with notes on what is not automated.

[LKuchno]

Android tests are failing because toasts and the Tabs screen list are displayed 'under' the system navigation bar on older Android versions. This test is waiting for a fix or a workaround.