docs: consolidated roadmap, ADR-013, drop stale plans
- New 7-phase roadmap (2026-05-07-gnoma-roadmap.md) covering M8 cleanup,
PTY interactive shell, SLM classifier, router revisit, USP security,
ELF support, and distribution
- ADR-013 (002-slm-routing.md): SLM-first routing supersedes ADR-009;
Thompson Sampling deferred pending SLM production data
- ADR-009 status updated to "Superseded by ADR-013"
- gemma-integration-analysis.md: header note that Node.js specifics
(LiteRT-LM, daemon, PID) don't apply to gnoma's Go implementation
- TODO.md replaced with thin pointer to roadmap + stable backlog
- Deleted stale plan/spec files: m6-m7-closeout, m8-hooks-design
vikingowl
0c65eeda08