[huntie]

Summary

Upgrade the React DevTools backend to match the React DevTools 8.0 frontend in React Native DevTools, which adds a Suspense panel. The 6.x backend does not report Suspense boundaries.

Note

Land together with the @react-native/debugger-frontend sync that brings in react/react-native-devtools-frontend#289 and react/react-native-devtools-frontend#290. Against the 6.x backend, the 8.x frontend fails to build the component tree, although the bridge protocol version is unchanged.

Changelog:
[General][Changed] - React Native DevTools: Upgrade react-devtools-core to 8.0.0

Test Plan

Ran RNTester on an iOS simulator with this backend, and the frontend from react/react-native-devtools-frontend#290 served through Metro's REACT_NATIVE_DEBUGGER_FRONTEND_PATH override.

iPhone 18 Pro	Components	Suspense
Temporary Suspense demo in Playground tab

✅ setUpReactDevTools connects unchanged: initialize and connectWithCustomMessagingProtocol keep their signatures in 8.0.
✅ The Components panel renders the tree, and the Suspense panel lists the screen's boundaries with what each suspended on.

Rechecked the Components and Profiler panels with this backend, against the frontend from react/react-native-devtools-frontend#290 rebased onto main.

Components	Profiler	View source from the inspector

✅ Selecting <RNTesterApp> in the Components panel shows its props, hooks and renderer.
✅ The Profiler records 3 commits while the app navigates between examples, with flamegraph timings and commit details.
✅ View source on <RNTesterApp> opens RNTesterAppShared.js at the component definition.