[Feature Request]: Use playlist thumbnail provided by YT

### Guidelines

- [X] I have searched the issue tracker for [open](https://github.com/FreeTubeApp/FreeTube/issues?q=is%3Aopen+is%3Aissue) and [closed](https://github.com/FreeTubeApp/FreeTube/issues?q=is%3Aissue+is%3Aclosed) issues that are similar to the feature request 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.
- [X] This issue contains only one feature request.

### Problem Description

1. Go to https://www.youtube.com/channel/UCXuqSBlHAE6Xw-yeJA0Tunw/playlists
2. Compare thumbnails in FT vs YT

In FT the thumbnail of the playlist is based on the first video in that list


### Proposed Solution

If possible use the thumbnail provided by YT

### Alternatives Considered

None.

### Issue Labels

visual improvement

### Additional Information

_No response_