Packager option to not produce a zip file

The packager currently is hard-set to produce a zip file:

https://github.com/awslabs/aws-lambda-cpp/blob/1129e531bae450b6fb78ad5fc08d6222ceb9f68d/packaging/packager#L184-L185

It would be useful to [add an option](https://github.com/awslabs/aws-lambda-cpp/blob/1129e531bae450b6fb78ad5fc08d6222ceb9f68d/packaging/packager#L34) to skip the zipping (which will also make it unnecessary to [have zip](https://github.com/awslabs/aws-lambda-cpp/blob/1129e531bae450b6fb78ad5fc08d6222ceb9f68d/packaging/packager#L54-L57) installed on the packaging system).

從 packaging/packager 開始，尤其關注第 34 行以及第 54-57 行附近的選項處理，還有第 184-185 行附近的 zip 建立。確認現有選項如何被解析，然後驗證新選項會跳過 zip 建立，並移除封裝系統對 zip 的需求。

由索引模型根據 Issue 內容生成。