Create roadmap and README documentation (#5)

Populated the previously empty README.adoc with full documentation of:
- 7 core CI scripts (~2,500+ lines of code)
- Detection capabilities (14+ languages, 15+ package managers, 20+ test
frameworks)
- CI/CD platform integration (GitHub Actions, GitLab CI)
- Test suite (17 BATS tests)
- Architecture diagram
- Quick start guide
- Configuration options
- Roadmap summary with current status

Co-authored-by: Claude <noreply@anthropic.com>

Author: hyperpolymath