Ability to control access of albums

[dusfor72]

Is your feature request related to a problem? Please describe.
Shared albums can be manipulated by any user of a group that is assigned to the album and may remove individual photos or even all photos from the album. As well adding photos is sometimes not wanted.
Having also in mind that some let's say not IT-related users, not familiar with the system but nevertheless interested in using it may destroy the work of assembling photos to albums.
On the other side these users may want to create their own albums and share them and are confused when they do not find them anymore or photos are missing.

Describe the solution you'd like
Functionality to control access to albums, like setting them read-only as a standard but as well open it up for changing things. Access control should be share-wise, so for a group or a specific user. Options might be read-only of the whole album, adding new photos to the album, removing photos from the album.
Things like resharing I would not consider.
Edit/Addition: Working with folders is not an option in this regard. Using Nextcloud with a camera setup, where taken pictures are sent automatically/instantly from the camera to the system, the folder structure in the "Cameras/Model"-Folder is synched accordingly by the cameras. So sharing a collection of photos out of several folders would lead to copying into another folder and with this to redundancy. -> Very bad workaround, cumbersome and not dynamic.

Describe alternatives you've considered
Sharing by link but that is not an option as it breaks the integrated approach of Nextcloud.
There was mentioned anywhere to use Flow, but that is as well not that easy for IT-distant users who truely want to use Nextcloud.

Additional context
I think it would bring users of Nextcloud a functionality that make it fun to work with when dealing with their albums and sharing them to the family, friends or colleagues.

BTW: Great work, your extension !Thanks for that !