[0.85] Backport performance debugging improvements

[motiz88]

Target Branch

0.85-stable

Link to commit or PR to be picked

facebook/react-native#56637

Description

Cherry-pick of 14 commits from main adding Performance debugging features (Frame Timings, screenshot capture, Page.captureScreenshot CDP support, dynamic screenshot sampling, trace chunk size optimization, PerformanceObserver race fix). All gated behind fuseboxFrameRecordingEnabled and fuseboxScreenshotCaptureEnabled feature flags (disabled by default).

Previously backported to 0.83-stable as a squashed commit in facebook/react-native#56372. For 0.85, the individual commits from main cherry-pick cleanly (two required feature flag file regeneration).

cc @huntie

[github-actions]

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