demo: Scenario Lab for PR #126 / issue #125

[SynurDevelopers]

Demo PR only: This branch is for manual validation of upstream PR #126. It is not intended to be merged into the library fix.

Summary

This PR adds Scenario Lab to the existing example app. The lab turns the manual checklist for issue #125 into a guided, repeatable test flow.

Scenario Lab provides:

• 47 guided scenarios covering focus requests, navigation timing, VoiceOver, autofocus, FocusTrap, focus ordering, events, recycling, and memory;
• instructions and expected results for each scenario;
• Pass, Fail, or Skip results with optional notes;
• results that persist across app launches through AsyncStorage;
• JSON and Markdown exports through the Share sheet; and
• seven Jest suites with 16 tests covering the scenario registry, navigation contract, result storage, event log, and exports.

Run the demo

git clone https://github.com/SynurDevelopers/react-native-external-keyboard.git
cd react-native-external-keyboard
git checkout demo/scenario-lab
yarn
cd example/ios
pod install
cd ../..
yarn example ios

Open Scenario Lab from the example app home screen.

For hardware, VoiceOver, Simulator, and Instruments requirements, see the Scenario Lab guide.

Scope

The demo is stacked on fix/ios-focus-path. It changes the example app and its test configuration; it does not change the iOS library implementation from upstream PR ArturKalach#126.

Supporting changes include:

• adding AsyncStorage for result persistence;
• adding Jest configuration and test dependencies for the demo;
• correcting the root yarn example workspace target;
• declaring the existing disabled prop in UseKeyboardFocusContainerProps; and
• replacing the unused LegacyRef import in MazeRender.tsx with RefObject.

The final two changes fix pre-existing TypeScript errors. They do not change runtime behavior.

Validation

Completed:

• yarn typecheck
• yarn test example/__tests__ — 16 tests across seven suites
• ESLint on the changed files — passed; only existing inline-style warnings remain

Still required:

• Build and open Scenario Lab on the iOS Simulator.
• Run representative scenarios on a physical device with a hardware keyboard.
• Confirm that results persist after relaunch and export correctly.