feat(image): add synchronized annotation and scene mesh overlays

[mingyang91]

Summary

• add an optional foxglove.ImageAnnotations topic to the Image panel and draw annotations in the worker
• add an optional foxglove.SceneUpdate topic for triangle meshes, projected with the camera's Double Sphere calibration
• share all-mode mesh decoding per player/topic, match mesh frames to rendered image timestamps, and keep overlays aligned across seek, pause, and replay
• tighten H.264 backpressure and seek recovery so multi-camera playback does not build an unbounded decoded-frame queue
• preserve both topic settings through layout import/export and add English, Japanese, and Chinese labels

Verification

• npm run lint
• npm test (106 test files, 661 tests)
• npm run build
• browser smoke test with six simultaneous H.264 Image panels and synchronized scene meshes, including seek, pause, and replay

[mingyang91]

Latest commit d1d1d1f adds independent persisted visibility controls for annotations and scene mesh, with mesh enabled in auto-layout. Verified locally: focused Image schema/sceneMesh/auto-layout tests (25/25), i18n check, TypeScript typecheck, ESLint, and browser playback of the six-camera MANO sample with the SceneUpdate mesh visible; toggling Show scene mesh off/on updates and persists panel config.