added tests

package.json

@@ -10,7 +10,8 @@
     "build": "astro build",
     "preview": "astro preview",
     "astro": "astro",
-    "lint": "eslint ."
+    "lint": "eslint .",
+    "test": "jest --coverage --passWithNoTests"
   },
   "dependencies": {
     "@astrojs/react": "^5.0.4",
@@ -29,6 +30,7 @@
     "@types/node": "^25.6.0",
     "eslint": "^10.3.0",
     "globals": "^17.6.0",
+    "jest": "^30.3.0",
     "jiti": "^2.6.1",
     "typescript-eslint": "^8.59.1"
   }