KAIROS v0.1.0

Initial public maintenance baseline for KAIROS.\n\nHighlights:\n- Documented KAIROS as a proactive OSS maintainer automation daemon.\n- Added MIT license, contributing guide, security policy, and agent instructions.\n- Added GitHub Actions CI for TypeScript typechecking.\n- Added issue templates and a changelog for open maintenance workflow.\n- Fixed TypeScript typecheck issues around .ts imports, webhook headers, and AutoDream result narrowing.