Add about tab to channel page

[triallax]

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

Add an about tab to the channel page, similar to the one in YouTube.

Additional context

Related issues: #5644, #5203

How will you/everyone benefit from this feature?

People will be able to learn more about channels from the info in the about tab.

[demonff1]

This feature is long overdue

[skyGtm]

How will you/everyone benefit from this feature?
Before subscribing a new channel I (many NP users) always try to read what the channel is all about, and decide that is it worth subscribing? Since NewPipe has become my goto app (and many others) to play Youtube videos, it is not possible to read COMPLETE channel About section within the app. Whenever I encounter a new channel in NewPipe, I have to search in a browser [because I don't use official YouTube app] for that channel to read its About section.

I think this feature will benefit all NewPipe users and may also fascinate them to abandon their official YouTube app.

Hopefully some developer will work on this soon.

Thankyou.

[SameenAhnaf]

Closing in favor of #2414