test(core-eslint): anchor-presence CI guard for // <gen:*> comments

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-eslint/package.json

@@ -8,6 +8,9 @@
     "./next": "./next.js",
     "./react-internal": "./react-internal.js"
   },
+  "scripts": {
+    "test": "vitest run --passWithNoTests"
+  },
   "devDependencies": {
     "@eslint/js": "^9.20.0",
     "@typescript-eslint/eslint-plugin": "^8.25.0",
@@ -16,7 +19,8 @@
     "eslint-config-prettier": "^10.1.0",
     "eslint-plugin-boundaries": "^4.2.2",
     "eslint-plugin-turbo": "^2.4.0",
-    "typescript-eslint": "^8.25.0"
+    "typescript-eslint": "^8.25.0",
+    "vitest": "^3.1.0"
   },
   "dependencies": {
     "globals": "^17.6.0"