feat(notify): add notif to internal users when granted

- add coalesced protection to avoid mail bombing if an invited goes many grant in a short period
    - add resentd method in share menu item (work for both internal and external users)
    - user can disable email notification via his properties
    - add env variable from admin to disable notifications

src/application/services/mod.rs

@@ -20,6 +20,7 @@ pub mod music_service;
 pub mod nextcloud_file_id_service;
 pub mod nextcloud_login_flow_service;
 pub mod recent_service;
+pub mod recipient_notification_service;
 pub mod search_service;
 pub mod share_browse_service;
 pub mod share_service;