Provide ability to explicitly upload and download to/from SAS Content

[clangsmith]

Is your feature request related to a problem? Please describe.
As a user, I would like to be able to easily upload and download files to/from SAS Content. I can currently upload files to SAS Content by dragging one or more files from the local machine (ex. File Explorer on Windows) into a folder in the Explorer section in the SAS pane, however this feature is not easily discoverable. And currently, I am unable to download from the Explorer pane at all. I would like to be able to download as well, and expect it given I can upload.

Describe the solution you'd like
In addition to the existing (drag/drop) upload capability described above, I would like to be able to right-click any folder in the Explorer pane, then see an Upload context menu item that I can use to explicitly upload content to this folder (if I have write permissions). When the Upload context menu item is clicked, a UI allows me to select one or more files, or even an entire directory, to upload to the selected folder.

Additionally, a "Download" context menu item would appear when I right-click one or more files (or even one or more folders?) in the Explorer section of the SAS pane, which would allow me to download the selected files/folders. Could consider "Save a copy" instead of "Download" if there is a way in the Save As dialog to navigate to a local and/or SAS Content location. In this way user could make a copy in SAS Content or on local machine.

Describe alternatives you've considered
Can accomplish upload today via drag/drop, but again, that is not obvious/discoverable. Can also mimic download by opening a file, then doing a Save As, but not as clean.

Additional context
Ideally, should be reasonably consistent with the Upload/Download functionality in SAS Studio, though it doesn't currently support folder upload/download.

Environment
SAS Viya 2023.09