Add macOS binary build to release workflow

[adamtheturtle]

This PR adds support for building and distributing macOS (ARM) binaries in the release workflow.

Changes

• release.yml:

  • Added a new build-macos job that runs on macos-latest (Apple Silicon), waits for PyPI propagation, builds both vws-macos and vuforia-cloud-reco-macos binaries using PyInstaller, and uploads the binaries to the GitHub release
  • Added actions/setup-python@v5 to the Windows build job to ensure pip is available for the PyPI propagation check

• README.rst: Added a new "Pre-built macOS (ARM) binaries" section that points to the full documentation

• docs/source/install.rst: Added detailed installation instructions for macOS binaries including:

  • curl commands to download and install the binaries
  • Instructions for removing the quarantine attribute (xattr -d com.apple.quarantine)

This follows the same pattern as the existing Windows and Linux binary builds.

---

Note

Introduces macOS binary distribution and stabilizes Windows release steps.

• New build-macos job on macos-latest builds vws-macos and vuforia-cloud-reco-macos via PyInstaller and uploads them to the GitHub release after waiting for PyPI propagation
• Windows job adds actions/setup-python@v5 to ensure pip is available for the PyPI version check
• Uses normalized version lookup with pip index versions for propagation verification before building binaries

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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macOS job missing Python setup for pip command

High Severity

The new build-macos job uses pip index versions in the PyPI propagation check (line 339) but is missing the Set up Python step that the build-windows job has. The PR description explicitly mentions that Python setup was added to Windows "to ensure pip is available for the PyPI propagation check" - the same setup is needed for macOS. Without it, the macOS build will fail when pip isn't properly available in PATH.