Add a side bar to scroll easier

[darumanzane]

Checklist

• [X] I've checked that there is no other issue about this feature request.
• [X] This issue contains only one feature request.
• [X] The title of this issue accurately describes the feature request.

Feature description

Side bar with alphabetical ordered letters to scroll faster. (Screenshot from the Deezer app).

Why do you want this feature?

Scrolling manually is insane when you have more than 100 songs in your library.

Additional information

No response

[Anonuser-code]

That would also solve this problem https://github.com/z-huang/InnerTune/issues/1520