docs: update Module-Index — rings module LOC + total 29 modules
Add comprehensive wiki: Home, Getting Started, Architecture, Module Index, Cognitive Blackboard, Roadmap, Contributing - Home.md: project overview, navigation table, quick start, status table - Getting-Started.md: installation, 4 code examples, common issues - Architecture.md: layered diagram, blackboard pattern, event bus, adapters, data flow - Module-Index.md: all 28 modules with status/LOC/path, grouped by category - Cognitive-Blackboard.md: full API reference with code examples - Roadmap.md: Phases 1-4, known science gaps, honest assessment - Contributing.md: code style, testing requirements, good first issues