Skipper — Codemagic trigger repo

Small helper repo used only as a build trigger on Codemagic, so we can test Skipper on a real Apple Silicon Mac (M2/M4) over VNC. Nothing is compiled here — the build is downloaded prebuilt and just launched.

Phase 0 — verify Codemagic + VNC

codemagic.yaml currently defines the vnc-smoke-test workflow, which just boots the Mac and keeps it alive so we can connect via VNC and confirm the whole path works.

Phase 1 — Skipper import/export (added later)

• download the Apple Silicon Skipper build (curl from our server),
• unpack and launch it,
• over VNC, import a test model and export the output,
• exported files are collected as artifacts: for download.

Connecting to Codemagic (manual URL / "Other")

1. Codemagic -> Add application -> Other (connect via URL).
2. Enter the repository URL: https://github.com/Atlantic18/SkipperArmTest.git (public, no key needed).
3. Start a build manually and connect over VNC.