chore(deps-dev): bump vitest from 2.1.9 to 4.1.7 (#12)

* chore(deps-dev): bump vitest from 2.1.9 to 4.1.7

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 2.1.9 to 4.1.7.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.7/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.1.7
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix(test): migrate to vitest@4 with vitest-pool-workers v0.16, cloudflareTest() API, and vite@6

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: tiennm99 <tiennm99@outlook.com>

cloudflare-worker/vitest.config.js

@@ -1,11 +1,10 @@
-import { defineWorkersConfig } from '@cloudflare/vitest-pool-workers/config';
+import { cloudflareTest } from '@cloudflare/vitest-pool-workers';
+import { defineConfig } from 'vitest/config';
 
-export default defineWorkersConfig({
-  test: {
-    poolOptions: {
-      workers: {
-        wrangler: { configPath: './wrangler.toml' },
-      },
-    },
-  },
+export default defineConfig({
+  plugins: [
+    cloudflareTest({
+      wrangler: { configPath: './wrangler.toml' },
+    }),
+  ],
 });