Add notification dot for new videos in the subscriptions list

[xgorex]

Checklist

• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Please add a notification dot to every subscribed channel at subscbtion list upon a new video nas become available.

Why do you want this feature?

You may jump into particular channel based on the new video notification dot. This feature would be super convenient while reviewing subscribed channel list without the to enter in and then discovery what's new for every channel.

Additional information

No response

[arnzzz]

this would be a really nice QOL addition. little example below.