docs: add /tdd natural trigger changes to v0.9.12 changelog

docs: update README to reflect natural /tdd trigger conditions

fix: make /tdd trigger naturally from Goal Definition Protocol and Proactive Suggestions

feat: cherry-pick from ECC - TDD RED/GREEN Gate, Session Save, Confidence Filtering (v0.9.12)

feat: cherry-pick from gstack - Search Before Building, AI Slop Detection, LLM Security Audit (v0.9.11)

docs: add v0.9.10 changelog for statusline update check fix

fix: statusline update check - use native claude CLI with 24h cache expiry

fix: use pnpm instead of npm in checklist build step

docs: remove non-adopted items from changelog

feat: cherry-pick from Antigravity Kit - questioning principles & checklist (v0.9.9)

feat: integrate oh-my-agent shared protocols (v0.9.8)

refactor: lightweight cleanup - remove duplicates and compress core files (v0.9.7)

feat: integrate UI UX Pro Max design intelligence (v0.9.6)

refactor: optimize core file tokens by extracting to optional/ (v0.9.5)

feat: integrate Harness Engineering concepts into framework (v0.9.4)