[Feature Request]: The ability to import playlists from Newpipe backups

### Guidelines

- [X] I have searched the [issue tracker](https://github.com/FreeTubeApp/FreeTube/issues) for a feature request that matches the one I want to file, without success.
- [X] I have searched the [documentation](https://docs.freetubeapp.io/) for information that matches the description of the feature request I want to file, without success.

### Problem Description

With the advent of playlist support coming, one feature I propose is the ability to import playlists from Newpipe, this would allow for a more seamless experience when jumping between Freetube and Newpipe, rather than needing to maintain two separate playlist sets between the both of them.

### Proposed Solution

Reading the data from the backup archive and importing them, much in the same way that subscriptions are handled, maybe giving an option to choose data to import when selecting that.

### Alternatives Considered

Alternatively it could also just import playlists when importing subscriptions from Newpipe, depending on how they save those.

### Issue Labels

ease of use improvement, improvement to existing feature

### Additional Information

_No response_