Implement a complete, production-ready CI/CD pipeline that runs 100% on
GitHub Actions with zero external dependencies. This replaces and consolidates
existing workflows with an optimized, streamlined pipeline.
## Major Changes
- Add 3 new workflows (ci-comprehensive, cd-development, cd-release)
- Remove 2 redundant workflows (backed up)
- Add 130+ tests across 4 new test files
- Add 8 documentation guides (60+ KB)
- Add developer tools and scripts
