- Add .goreleaser.yaml for cross-compilation (darwin/linux × amd64/arm64)
- Add GitHub Actions workflow with SHA-pinned actions, semver tag filter,
  concurrency group, and 15-minute timeout
- Add MIT LICENSE
- Change module path to github.com/ai-screams/howl (lowercase convention)
- Add --version and --help flags with ldflags injection
- Update Makefile with version injection, release-dry, release-check targets
- Update README with binary download instructions and correct URLs