Add Makefile + CI Pattern

[williamofai]

Issue: Add Makefile + CI Pattern

Summary

Roll out the Makefile + scripts + GitHub Actions pattern established in certifiable-inference#3 to this repository.

Background

@brixen implemented a clean build pattern in [certifiable-inference#3](SpeyTech/certifiable-inference#3):

• Makefile — Single entry point for all project commands
• scripts/deps.sh — Dependency installation
• GitHub Actions — CI that mirrors local dev workflow

This pattern provides:

• Clear documentation via make help
• Reproducible builds across environments
• CI/dev parity (no drift)
• Foundation for ttsim integration

Tasks

• Add Makefile with standard targets (deps, config, build, test, clean, help)
• Add scripts/deps.sh for dependency installation
• Add .github/workflows/ci.yml
• Update README with Makefile documentation
• Verify CI passes on x86_64

Acceptance Criteria

make deps      # Installs dependencies
make build     # Builds successfully
make test      # All tests pass
make help      # Shows available targets

GitHub Actions green on push.

Assignee

@brixen

Labels

enhancement infrastructure good first issue