[Feature Request]: Remove thumbnails from "Add to playlist" view

### 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

The "Add to Playlist" UX is somewhat clunky at the moment due to its size, which is a very avoidable problem, in my professional opinion. Playlist thumbnails are perhaps useful for remote playlists where it advertises the type of content for outside observers, but user playlists are known & (presumably) meaningfully labeled divisions, and often far more variegated in the range of content contained.

### Proposed Solution

By removing the thumbnails from the "Add to Playlist" UX, you greatly reduce the cognitive effort required for visual scanning, and you also reduce the large amount of movement & scrolling when someone has more than a small handful of playlists.

This will also require some UX changes to make it work, like reworking the "added" UX, stacking the items vertically, and reducing the width of the dialog. YT UX for reference.


### Alternatives Considered

Do not implement this feature.

### Issue Labels

ease of use improvement, visual improvement

### Additional Information

_No response_