chore: add Expo react-native and react-native-web example

[chriscoomber]

See #352.

Added example usage with expo.

Configuration which has been applied, which differs from the expo template:

• switch jsEngine to hermes
• allow .cjs files (see metro.config.js)
• polyfill bits of Intl namespace which aren't covered by hermes (hermes includes some support for Intl, but not all)

Before submitting the PR, please make sure you do the following

• It's really useful if your PR references an issue where it is discussed ahead of time.
• Prefix your PR title with [feat], [fix], [chore], or [docs].
• This message body should clearly illustrate what problems it solves.
• Ideally, include a test that fails without this PR but passes with it.

Tests

• [sorry, I had a failure but wasn't sure if it was my environment] Run the tests with pnpm test and lint the project with pnpm lint

[ivanhofer]

Looks great. Thanks for the PR!