test: enable working coverage provider for vitest

Author: Alex K

package.json

@@ -23,11 +23,12 @@
   "license": "MIT",
   "packageManager": "pnpm@10.7.1",
   "devDependencies": {
-    "eslint": "^9.25.1",
-    "eslint-plugin-jsdoc": "^50.6.10",
     "@changesets/cli": "2.29.2",
     "@commitlint/config-conventional": "19.8.0",
+    "@vitest/coverage-v8": "^3.1.2",
     "commitlint": "19.8.0",
+    "eslint": "^9.25.1",
+    "eslint-plugin-jsdoc": "^50.6.10",
     "husky": "9.1.7",
     "lint-staged": "15.5.1",
     "prettier": "3.5.3",