Add a warning / confirmation to prevent mass deletion of files / folder locally when a folder is removed from the server - especially for Group Folders

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## Feature request

**Which Nextcloud Version are you currently using:**
- Server: 32.0.0
- Desktop Client: 3.16.3

**Is your feature request related to a problem? Please describe.**
If the Group Folders (now Team Folders) app fails (due to update or otherwise), then all files in group folders gets deleted locally. I guess similarly if a user delete an entire folder.

**Describe the solution you'd like**
Would be great if the desktop client had some sort warning or ask confirmation before deleting an entire Group Folder (and maybe a way to detect if the app has stopped running). Or even better, a warning/confirmation for any folder bigger than X amount of file/GB that gets removed from the server, with that said amount being configurable by the user, in the same way we can configure the size of new folder which requires a confirmation before syncing.

**Additional context**
https://github.com/nextcloud/desktop/issues/8784