feat(camera): add iOS simulator camera simulation

[DjDeveloperr]

Summary

• move camera feed ownership into the SimDeck daemon with a native AVFoundation/shared-memory service linked into simdeck-bin
• remove the separate macOS camera helper app build; keep only the simulator DYLD injector as a packaged camera artifact
• route simdeck camera ... CLI commands through the daemon HTTP API so the feed survives command exit
• update docs/operator skill and extend camera integration coverage to generated static video frames

Validation

• npm run build
• cargo test --manifest-path server/Cargo.toml
• cargo clippy --manifest-path server/Cargo.toml --all-targets -- -D warnings
• npm run --prefix client test
• npm run test:integration:camera (image source, generated .mov video source, placeholder source)
• cargo fmt --manifest-path server/Cargo.toml --check
• git diff --check
• node --check scripts/integration/camera.mjs
• ./build/simdeck -r and ./build/simdeck camera sources

Webcam end-to-end streaming is intentionally not claimed here; Mac camera source enumeration works and the daemon path has the webcam source implementation, but this final pass focused on static media plus app injection.

[coderabbitai]

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