misc: Updates yarn command adding mode argument

[antonis]

Depends on: #4087 to avoid any conflicts in the contributors guide for v6.

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

Updates yarn commands in the Run the emulators sections and replaces the configuration and variant arguments that have been deprecated in 0.71 with the mode argument. Reference:

• Android RN Docs
• iOS RN Docs

💡 Motivation and Context

I was getting unknown option --configuration/variant errors and inconsistency with the current scripts as reported here.

💚 How did you test it?

Run the updated commands locally

📝 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

[lucas-zimerman]

Thank you for the PR!

[krystofwoldrich]

LGTM 🚀