[Feature Request]: Add a graph displaying the most-viewed timestamps of a video

### 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

On YouTube’s website, there is a graph above the timeline that shows the most replayed sections of a video, making it easy to find the most important parts instantly. This feature is especially helpful for long videos, such as interviews, where users may want to quickly locate key highlights without manually scrolling through the entire video. Unfortunately, this functionality is missing in FreeTube, which makes navigation less efficient.

### Proposed Solution

Add a graph to FreeTube that displays the most-viewed timestamps of a video, similar to the one on YouTube’s website. This feature would allow users to identify the most important parts of a video instantly. If implementing this feature requires data from YouTube’s API, it would be helpful to explore whether it is technically feasible.

### Alternatives Considered

I don't think there are any.

### Issue Labels

display more information to user, ease of use improvement, new feature, visual improvement

### Additional Information