[Feature request] Add option "share subfolders"

Please add option to share subfolders.
I would like to share one folder and next subfolders/files should be shared automatically.
For example, I want to create and share (with my family) one folder "photos". Next time, I want to upload(or create) folders and files directly into shared folder. Uploaded/Created subfolders/files should be visible without any actions.

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No file, test, or entry point is named. Start by locating the existing folder-sharing and permission-propagation paths, then define how newly uploaded or created descendants inherit visibility and how the described shared-parent scenario can be tested.