Add support for Vitest VSCode Plugin and similar

### Command

test

### Description

As Angular does not provide a Vitest plugin, it can't expose a `vitest.config.ts` file to 3rd party tools such as IDEs.

This means that as of today, it is impossible to use Vitest VSCode Plugin, nor WallabyJS, nor WebStorm integration etc... unless users switch to Analog plugin https://analogjs.org/docs/features/testing/vitest

### Describe the solution you'd like

_No response_

### Describe alternatives you've considered

_No response_

從 `test` 命令開始，調查 Angular 目前如何向外部工具公開 Vitest 設定。使用 Vitest VSCode Plugin 重現這項限制，然後將其行為與 issue 中提到的 Analog plugin 進行比較。當該外掛程式和類似的整合能夠在不切換外掛程式的情況下發現 Angular 專案的 Vitest 設定時，即視為完成。

由索引模型根據 Issue 內容生成。