docs: PROJECT.md is 2+ phases behind and has broken local path

- L7: says "Phase 0 (Foundation) in progress. 2 PRs merged" — Phase 0 (koinon), Phase 1 (kryphos), and Phase 2 (syntonia) are all complete
- L17-21: phase table shows Phase 0 as "In progress" and Phase 1 as "Queued"
- L24: broken local path `/media/theke/projects/akroasis/planning/roadmap.md`
- L31: em dash "Sibling project — same toolchain" → use colon or comma