[Suggestion] Be able to search only live streams

[tuxayo]

Checklist

• [X] I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• [X] 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.
• [X] I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.

Feature description

In the menu to filter the search where there is "All, videos, Channels, Playlists, etc" there could be a lives/streams/live streams option.

Why do you want this feature?

For example if searching for a group/category that does livestreams like "vtuber" "vtuber french" "hololive" "vshojo" "nijisanji"

It would make much easier to get the currents live streams of that group/category. Now it's just drowned in clips and streams archives.

Additional information

[opusforlife2]

The "live" filter isn't in the same group as the "result type" filter (videos/channels/playlists). It's a video tag (like HD/3D/360). So this is a duplicate of #2251.

You can keep an eye on https://github.com/TeamNewPipe/NewPipeExtractor/pull/488 BTW.