feat(samples): Add Expo sample application

[krystofwoldrich]

📢 Type of change

• Enhancement

📜 Description

This PR adds an Expo application sample.

💡 Motivation and Context

• sentry-expo deprecations plans #3262

💚 How did you test it?

Build with Expo Go

• web build depends on fix(web): Fix JSX build errors when using Webpack #3428

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled
• All tests passing
• No breaking changes

🔮 Next steps

#skip-changelog

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 43a70d6

[github-actions]

Android (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	410.52 ms	427.66 ms	17.14 ms
Size	17.73 MiB	19.84 MiB	2.11 MiB

[github-actions]

iOS (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1268.82 ms	1284.36 ms	15.54 ms
Size	2.36 MiB	2.87 MiB	521.03 KiB

[github-actions]

Android (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	393.90 ms	424.16 ms	30.27 ms
Size	7.15 MiB	8.11 MiB	987.03 KiB

[lucas-zimerman]

Ideally we should use some Sentry icons for the sample but that could be done on another issue. For now the PR is good for merging