Update README: accurate counts, 3-command architecture, topology, React UI, benchmarks

- Fix detector count (97, not 106), ANTLR grammars (10, not 6)
- Add three-command architecture (index/enrich/serve)
- Add service topology section with multi-repo support
- Add config-driven pipeline section with .osscodeiq.yml
- Update Web UI to React 18 (Dashboard, Topology, Explorer, Flow, Console, API Docs)
- Update MCP tools count (31: 21 core + 10 topology)
- Update REST endpoints count (32+), node types (32), edge types (27)
- Add memory profile and full benchmark table (13 projects)
- Add Kubernetes/Helm section
- Fix badge URLs to main branch, correct CI workflow name
- Fix Maven version to 0.0.1-beta.0, JAR name to cli classifier
- Remove references to java branch checkout

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: aksOps