* Add macOS compatibility CI: unit tests + smoke test on macos-14/15
New workflow runs on GitHub-hosted macos-14 and macos-15 runners
(matrix strategy). Each run: unit tests via cmux-unit scheme, then
a smoke test that builds the app, launches it, sends a command via
the socket, and verifies it stays alive for 15 seconds.
* Select latest Xcode on runner (fix macos-14 Swift tools version)
macos-14 runners default to Xcode 15.4, but sentry-cocoa needs
Swift tools version 6.0 (Xcode 16+). Pick the latest Xcode_*.app
instead of the default symlink.
* Launch app binary directly in smoke test for better CI compatibility
Using `open` can fail silently on CI runners. Launch the binary
directly with env vars set, capture stdout/stderr, and add process
health checks with diagnostic output (debug log tail, crash reports)
on failure.
b3f6f8cfd7