[Feature Request]: Pinned buffers persist scrolling

### What?

I wondered that pinning a buffer won't make them scroll persistent. Or that there isn't an option for it.

I know this might be an opinionated issue opening, but maybe you can also see a point in this.

Also, I might just be doing something wrong with my config that it doesn't behave that way?

### Why?

- Improve UX.
- Pinning buffers gets a more distinct functionality and its own use case: When sorting buffers first is all there is to pinning-a-buffer, it is something that can also be achieved by other functionalities.

An example use case for this feature:
Keeping buffers in focus where the main work is concentrated even when having a number of buffers open that exceeds the bufferline length.