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>

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "lib": ["ES2022"],
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "verbatimModuleSyntax": true,
+    "forceConsistentCasingInFileNames": true,
+    "allowImportingTsExtensions": true,
+    "noEmit": true,
+    "types": ["node"]
+  },
+  "include": ["src/**/*.ts", "tests/**/*.ts"]
+}