feat(infra): Homebrew distribution

[omriariav]

Summary

Publish gws via Homebrew tap for easy installation.

Priority: P2 | Complexity: Simple

Usage

brew tap omriariav/tap
brew install gws

Implementation

• Create homebrew-tap repo at github.com/omriariav/homebrew-tap
• Add formula with binary downloads from GitHub releases
• Set up GoReleaser for automated release builds (multi-arch: darwin-arm64, darwin-amd64, linux-amd64)
• Add installation instructions to README