rename(phase 1): CapaKraken → Nexus across code, UI, docs, CI (#61) Co-authored-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com> Co-committed-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com>
Adds `pnpm check:unused` script powered by knip. Initial run finds 17 unused files, 3 unused deps, 96 unused exports, and 117 unused exported types — all candidates for cleanup. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>