- Add GitHub Actions CI (test on Linux/macOS/Windows, fmt, clippy)
- Add release workflow with prebuilt binaries for all platforms
- Add --completions flag for bash/zsh/fish/elvish/powershell
- Add Homebrew formula
- Update Cargo.toml with crates.io metadata
- Add .DS_Store to .gitignore
- Set GitHub repo topics and description
- Document shell completions and prebuilt binaries in README