Support sharing folders with "Add share link from Nextcloud Files" action

Is your feature request related to a problem? Please describe.

I presume that the file-picker is the responsible component for this but:

I think there it would be reasonable to let users share folders as links too when you click "Add share link from Nextcloud Files".
I mean if I have ordered the stuff I need to share in a directory anyway (because it's not one-two files) that's way easier.
Technically the string doesn't say file, so I presumed creating a link to folder also work.

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

Additional context

#6080 Would make this harder I think, as folders cannot be added as an single attachment.
So if you make share-link and add-attachment the same action - initially -, the file picker would need to have different possibilities based on selection is a folder or file.
Okay, folders could be either attached as:

• attaching all their items - recursively! - which makes file picker even more complicated, and the share loses it hierarchical metadata!
• attaching as zip - maybe okay, but that's another complication anyway. And then let's support creating password protected zips, compression level and different archives, etc.

Start by tracing the "Add share link from Nextcloud Files" action and the referenced Nextcloud file-picker component. Read issue #6080 for the attachment constraints, then clarify whether folder selection should create a share link independently or also act as an attachment. Done requires an agreed folder-link behavior and corresponding implementation scope.