Add support for prebuilt Erlang/OTP installations on MacOS using @erlef/otp_builds

[Copilot]

This PR implements support for installing prebuilt Erlang/OTP versions on MacOS using the @erlef/otp_builds repository, addressing the feature request to add MacOS prebuilt support.

Changes Made

Core Implementation

• hooks/pre_install.lua: Added MacOS prebuilt detection and URL generation

  • Supports MacOS versions: macos-11, macos-12, macos-13, macos-14
  • Generates URLs following pattern: https://github.com/erlef/otp_builds/releases/download/OTP-{version}/otp_{macos_version}_{arch}.tar.gz
  • Includes proper validation with clear error messages for unsupported versions

• hooks/post_install.lua: Added MacOS-specific installation logic

  • MacOS prebuilts are ready-to-use installations that just need file organization
  • Moves extracted contents to release/ subdirectory to match expected vfox structure
  • Different from Linux which uses an Install script

Documentation & Testing

• README.md: Updated with MacOS prebuilt installation instructions and examples
• .github/workflows/e2e_test_darwin_prebuilt.yaml: Added E2E test workflow for MacOS prebuilts

Usage

Users can now install prebuilt Erlang/OTP versions on MacOS:

# Install a prebuilt version for MacOS 13 (Ventura)
USE_PREBUILT_OTP="macos-13" vfox install erlang@26.2.3

# Search available versions with prebuilt enabled
USE_PREBUILT_OTP="macos-13" vfox search erlang

Supported Platforms

Platform	Supported Versions	Architecture
Linux	ubuntu-14.04 through ubuntu-24.04	amd64, arm64
MacOS	macos-11, macos-12, macos-13, macos-14	amd64, arm64
Windows	All versions	amd64, x86

Benefits

• Faster installations: No need to compile from source on MacOS
• Consistent binaries: Use officially built binaries from @erlef/otp_builds
• Better CI/CD: Enables faster MacOS builds in automated environments
• Reduced dependencies: No need for build tools and compilation dependencies

Validation

• ✅ Lua syntax validation passed
• ✅ URL generation tested for all supported MacOS versions and architectures
• ✅ File organization logic tested and handles edge cases
• ✅ Error handling validates unsupported macOS versions
• ✅ Documentation includes clear usage examples

This change maintains backward compatibility while extending prebuilt support from Linux-only to include MacOS, providing a consistent experience across platforms.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• builds.hex.pm
  • Triggering command: curl -s REDACTED (dns block)
• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)
• https://api.github.com/repos/erlef/otp_builds/releases
  • Triggering command: curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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