chore(deps-dev): bump vitest and @vitest/coverage-istanbul

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) and [@vitest/coverage-istanbul](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-istanbul). These dependencies needed to be updated together.

Updates `vitest` from 3.2.4 to 4.0.14
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.0.14/packages/vitest)

Updates `@vitest/coverage-istanbul` from 3.2.4 to 4.0.14
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.0.14/packages/coverage-istanbul)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.0.14
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: "@vitest/coverage-istanbul"
  dependency-version: 4.0.14
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -54,7 +54,7 @@
     "@tsconfig/node20": "^20.1.8",
     "@types/mdast": "^4.0.4",
     "@types/node": "^20.19.25",
-    "@vitest/coverage-istanbul": "^3.2.4",
+    "@vitest/coverage-istanbul": "^4.0.15",
     "cspell": "^9.4.0",
     "eslint": "^9.39.1",
     "eslint-plugin-simple-import-sort": "^12.1.1",
@@ -63,7 +63,7 @@
     "typescript": "^5.9.3",
     "typescript-eslint": "^8.48.1",
     "vite": "^7.2.7",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.15"
   },
   "dependencies": {
     "chalk": "^5.6.2",