Add Homebrew installation support

[Copilot]

BeamCommander was only distributable as a macOS .app bundle. This adds Homebrew as the primary installation method while maintaining .app bundle compatibility.

Changes

• Homebrew Formula (Formula/beamcommander.rb)

  • Builds from source using existing make build system
  • Extracts binary from .app/Contents/MacOS/ bundle
  • Handles libfmod.dylib dependency via wrapper script with DYLD_LIBRARY_PATH
  • Installs to standard Homebrew directories (bin, lib, share, doc)

• Installation Documentation

  • INSTALL.md: User-facing installation guide for all methods
  • HOMEBREW.md: Maintainer guide for formula updates and releases
  • TESTING_HOMEBREW.md: Testing procedures and checklist
  • Formula/README.md: Quick reference for formula usage

• Updated README.md

  • Homebrew as Option A (recommended)
  • .app bundle as Option B (still supported)
  • Updated prerequisites to macOS 10.15+ (from 15.6.1+)

• Release Workflow

  • Updated .github/workflows/build-and-release.yml to include Homebrew instructions in release notes

Installation

brew tap oliverbyte/beamcommander https://github.com/oliverbyte/beamcommander
brew install beamcommander
beamcommander

Notes

• Formula SHA256 is placeholder - needs update with actual release tarball checksum
• No changes to build system or existing binary generation
• Both installation methods (Homebrew and .app) can coexist

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