add visual timeline aka timelens.io

[trockenasche]

Checklist

• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

Describe the feature you want

I think it would be nice if you add feature of a visual timeline aka timelens.io.
"Visual timelines shows the structure of a video at a glance, by visualizing it's color development."

I'am using this already at youtube with the desktop browser.

How will you/everyone benefit from this feature?

This feature will help everyone to find the right spot in any video because of the visual timeline.