Ability to create, download and upload folders

[jrcamelo]

Although it should not be a priority, the user should be able to execute operations with folders, such as creating a new folder, uploading files there, and downloading every file in a folder.

While Google Drive does not support folder transfers, it has a parent and child logic that we can use.

For creating the folder and uploading files to it, we can follow the specific documentation for Create and Populate folders, as well as the one for insert.

While for the download, we can find all files within that folder using the list method with a search for parentId, then download each file separately in a loop as explained in this Stack Overflow answer and on the get documentation.