feat(reader): STATUS.md parser + TS project scaffold [skip-tdd: visual for configs]

- vitest+TS scaffold (package.json/tsconfig/vitest.config = config artifacts)
- src/parser.ts: parses STATUS.md blocks → StatusBlock[]
- tests/parser.test.ts: 6 cases (single, multi, blocker, null-blocker, empty, unknown emoji)
- fix emoji contract: align with using-tasks reality (⚪ open / 🔴 in_progress / 🟡 paused / 🔵 blocked / 🟢 done); reader-task acceptance + design doc updated

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/fixtures/status-single-block.md

@@ -0,0 +1,10 @@
+# Task Board
+_Updated: 2026-05-22_
+
+## 🔴 [board-viewer-pointers] — pre-impl: fill Domain conventions with design-context pointers
+**Status:** active
+**Where I stopped:** только что промочен дизайн.
+**Next action:** вставить блок в `.wiki/CLAUDE.md`.
+**Branch:** master
+
+---