Redistribute E2E tests between single-node and multi-node suites, slim
down pseudo multi-node suite, and remove directory creation from
dev-setup.sh so spx admin init is the single source of truth for
~/spinifex/ setup.
- Add CLAUDE.md with development guidance and architecture documentation
- Add HIVE_DEVELOPMENT_PLAN.md with detailed roadmap integrating all TODO items
- Update README.md with development setup and engineering philosophy
- Transform TODO.md into structured roadmap with phase integration
- Add development automation scripts (clone-deps.sh, dev-setup.sh)
- Add configuration templates and systemd service files
This establishes the foundation for scalable multi-repository development
and provides clear guidance for contributors and development workflows.