Add image request priority debug overlay#56970
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Summary: Use Fabric layout data to classify image shadow nodes as visible or offscreen on Apple platforms. Offscreen image requests now use `ImageRequestPriority::Prefetch`, which is bridged to the existing `RCTImageLoaderPriorityPrefetch` API, while visible images stay at `Immediate`; the new React Native feature flag defaults to `false` until app-specific gating wires it up. Differential Revision: D106074485
Summary: Add an opt-in `RCT_IMAGE_REQUEST_PRIORITY_DEBUG_OVERLAY` label for Fabric image component views so local debugging can show whether an image request is using immediate priority or the offscreen prefetch path. Differential Revision: D106363533
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Summary: Add an opt-in
RCT_IMAGE_REQUEST_PRIORITY_DEBUG_OVERLAYlabel for Fabric image component views so local debugging can show whether an image request is using immediate priority or the offscreen prefetch path.Differential Revision: D106363533