Refresh React Native example app UI

[dewana-sl]

Summary

• refresh the Bare React Native, Expo, word timing, and offline bundled-assets example screens with a shared neutral layout
• use the KittenML PNG logo in each example header
• show the full SDK voice list in the Word Timings example instead of limiting it to four voices
• add consistent model/status rows, chip controls, grouped playback actions, result panels, and disclaimer styling
• keep the existing SDK flows and package/native configuration unchanged

Testing

• prettier --config examples/BareRNExample/.prettierrc.js --check examples/BareRNExample/App.tsx examples/ExpoExample/App.tsx examples/ExpoWordTimingsExample/App.tsx examples/OfflineBundledAssetsExample/App.tsx
• git diff --check
• style reference sanity check for all edited styles.* keys
• npm ci in examples/ExpoWordTimingsExample
• npx tsc --noEmit in examples/ExpoWordTimingsExample
• npx expo run:ios in examples/ExpoWordTimingsExample, launched successfully on iPhone 17 Pro simulator and rendered the PNG logo

[greptile-apps]

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