Sharing studies: receive an (e-mail) notification when someone shares a study with me

[elisabettai]

Describe the user role
As a collaborative user, I would like to be notified when someone shares a study with me

Bonus: I can refuse the sharing.

Describe the benefit
Right now I don't know is someone has shared a study with me, unless the collaborator notifies me. A notification will make collaboration more efficient. Plus, it will make collaboration more fun (I might get curious of what other users have developed and shared with me).

Bonus: I don't want others' people stuff, only my studies are cool -> don't want to receive this sharing. 😄

Additional context
Suggestion from Team Black (ED) on Oct 19 2022. This will also help with #716

[elisabettai]

Another suggestion from Team Black (on Feb 22 2023): when I share a study with a collaborator, we could add to the message that says "Collaborator successfully added" that the collaborator will not receive a notification. @odeimaiz

[elisabettai]

Closing this one because Team Black was happy with the new notification system (bell) presented on Apr. 5 2023.

There's a follow up case for the bonus in #935

Bonus: I don't want others' people stuff, only my studies are cool -> don't want to receive this sharing. smile