chore: secret menu for dev config

[isekovanic]

🎯 Goal

This PR creates a way for us to switch push providers on the fly. It's meant to be used for testing purposes while the BE team works on the new PN infrastructure.

How-to:

• In the user menu (top left corner), you can press on the currently logged in user's name/image 7 times and another menu will appear
• In this menu you can:
  • Choose between preset push providers (currently only Firebase and APNs)
  • Remove all devices for the given user

Whenever switching between push providers please make sure to also close and reopen the app.

🛠 Implementation details

🎨 UI Changes

iOS

Before	After

Android

Before	After

🧪 Testing

☑️ Checklist

• I have signed the Stream CLA (required)
• PR targets the develop branch
• Documentation is updated
• New code is tested in main example apps, including all possible scenarios
  • SampleApp iOS and Android
  • Expo iOS and Android

[stream-ci-bot]

🎉 This PR is included in version 6.6.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀