Add Codecov

package.json

@@ -51,6 +51,9 @@
     "@eslint/js": "^9.39.2",
     "@tailwindcss/forms": "^0.5.10",
     "@tailwindcss/postcss": "^4.1.18",
+    "@testing-library/jest-dom": "^6.8.0",
+    "@testing-library/react": "^16.3.0",
+    "@vitest/coverage-v8": "^4.0.18",
     "eslint": "^9.25.1",
     "eslint-config-next": "^15.5.11",
     "eslint-config-prettier": "^10.1.8",
@@ -59,8 +62,6 @@
     "eslint-plugin-prettier": "^5.5.4",
     "eslint-plugin-react": "^7.37.4",
     "eslint-plugin-react-hooks": "^5.2.0",
-    "@testing-library/jest-dom": "^6.8.0",
-    "@testing-library/react": "^16.3.0",
     "jsdom": "^26.1.0",
     "postcss": "^8.5.6",
     "prettier": "^3.7.3",