[fr] implement ratio of likes/dislikes

[throwaway242685]

Checklist

• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• 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

it would be extremely useful to have a ratio of likes/dislikes.

Why do you want this feature?

having a ratio of likes/dislikes makes it so much easier to identify a good video from a bad one.

Invidious also displayed this ratio before (until YouTube officially removed the dislikes).

Why is the feature relevant to this fork?

this is the only fork of NewPipe that displays dislikes.

Additional information

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