[Migration] The whole Code Base on Typescript

This issue is just to request for handling or inviting developers for migrating the code base to typescript.
**Benefits**
- high definition type
- More Secure code base
- More readable and beginner friendly code
- Splitting out of the compilation errors
- Huge numbers of existing types available already by the packages used in this project

**My approach planning**
We can start the migrating in a separate branch
The migration can start with moving the tests to typescript

I would appreciate hearing back from the team for this.

首先檢視 mern-cli 程式碼庫及其測試配置，以確定移轉範圍；issue 中沒有指定檔案或具體進入點。開始工作前，請與 maintainers 確認是否應移轉 deprecated 專案，並就需要轉換程式碼和測試的哪些部分達成共識。

由索引模型根據 Issue 內容生成。