Mobile: Upgrade to React Native 0.76 and enable the New Architecture

[personalizedrefrigerator]

Summary

This pull request upgrades to React Native 0.76 and enables the New Architecture.

Rationale:

• React Native's New Architecture is now the default in RN 0.76.
  • This should bring performance improvements.
  • This may simplify creating native modules.
• Voice typing:
  • I would like to check whether whisper.cpp (a C++ library) is able to run larger Whisper models on mobile devices. With ONNX, the largest model that works on my Android device is whisper-tiny. The ONNX library also seems to cause crashes during voice typing on 32-bit Android.
  • React Native includes a guide for writing custom native modules in C++. The guide describes creating a Turbo native module, which requires the New Architecture.
• Reporting React Native bugs:
  • I've noticed issues related to onAccessibilityEscape on Modal dialogs. React Native's issue template states that they will not look into issues observed in unsupported versions (e.g. React Native 0.74).

Observed issues

(Testing on iOS 18 and Android API 35)

• New note menu has incorrect padding when open.
  • Should be resolved by Mobile: Implement new note menu redesign #11780.
• A crash was observed while typing in the plugin search field on iOS.
  • This is a React Native Paper text input and React Native Paper has since been upgraded. This may have fixed the issue.
• When opening the settings screen, a warning is logged that mentions the react-native-slider component.
  • This may be fixed by Mobile: Resolves #10883: Remove slider component module and replace integer settings with new validated component #11822.

Changed libraries

Some libraries needed to be upgraded to support the new React Native version and the New Architecture:

• Switching to a maintained fork that supports the New Architecture:
  • Switched from react-native-fs to @dr.pogodin/react-native-fs
• Other package upgrades:
  • react-native-image-picker, react-native-document-picker (renamed to @react-native-documents/picker), expo, expo-camera, react-native-paper, react-native-webview.