Upgraded example to RN 0.81

[scarlac]

Upgraded example to RN 0.81

Added consistent example styles
Added node requirement specification
Removed SafeAreaView
Added dummy SafeAreaView implementation

From this PR and onward, we are only going to support new arch.

[Copilot]

Pull Request Overview

This PR upgrades the React Native example app from version 0.76.3 to 0.81.0, modernizing the project structure and dependencies. The upgrade includes implementing a custom SafeAreaView component, updating to React 19.1.0, enabling the new architecture, and removing test-related files.

Key changes:

• Upgraded React Native from 0.76.3 to 0.81.0 and React from 18.3.1 to 19.1.0
• Replaced built-in SafeAreaView with custom implementation to avoid deprecated imports
• Enabled React Native's new architecture and updated iOS project structure

Reviewed Changes

Copilot reviewed 27 out of 31 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
example/package.json	Updated React Native, React, and related dependencies to 0.81/19.1 versions
example/src/SafeAreaView.tsx	Added custom SafeAreaView implementation to replace deprecated imports
example/src/CameraExample.tsx	Updated imports to use custom SafeAreaView and removed unused imports
example/src/BarcodeScreenExample.tsx	Updated to use custom SafeAreaView component
example/src/App.tsx	Redesigned with dark theme and improved styling
example/ios/*	Converted iOS project from Objective-C to Swift with new architecture support
example/android/*	Updated Android build configuration for RN 0.81 compatibility
example/tsconfig.json	Added TypeScript configuration extending RN 0.81 defaults

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