✨ feat(typescript): add standards docs and sync rewrite coverage

tests/test_readme_language_lists.py

@@ -0,0 +1,15 @@
+import unittest
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+README = ROOT / "README.md"
+
+
+class ReadmeLanguageListsTests(unittest.TestCase):
+    def test_rulesets_list_includes_typescript(self):
+        text = README.read_text(encoding="utf-8")
+        self.assertIn("- `rulesets/typescript/index.md`：TypeScript 核心约定", text)
+
+
+if __name__ == "__main__":
+    unittest.main()