Support for New Architecture

[pfeiffer]

This PR updates the library to require React Native 0.76+ and configures it for New Architecture compatibility via the interop layer.

Breaking Changes

• Minimum React Native version: >=0.76.0 (Expo SDK 52+)
• New Architecture must be enabled (RCT_NEW_ARCH_ENABLED=1)

Build Configuration

• iOS: Removed conditional New Architecture checks, always enabled
• Android: Removed conditional checks, always apply React plugin with Codegen config

JavaScript Layer

• Use TurboModuleRegistry instead of NativeModules for session manager
• Use Codegen-generated Commands for cleaner command dispatch
• Removed platform-specific command handling logic

Message passing

• Changed message passing from JavaScript (WebView) -> native to always serialize to JSON for consistency between the platforms and to be able to generate codegen properly (ie. message is now always a string). We parse the JSON on the React Native side.

Android Native Code

• Fixed: Changed events from bubbling to direct (consistency with iOS)
• String-based command routing instead of ordinal-based
• Minor cleanup: removed unnecessary empty array check in getSessionHandles
• Removed unused import in RNWebChromeClient

Architecture Note

Native implementations remain on Paper architecture. The library runs via React Native's interop layer when New Architecture is enabled.

[sethhorsley]

This is awesome!!!