[Feature Request]: please tell me how to pin a file to remove the file name so that there is only an icon.

### What?

as I used barbar
and I liked the possibility to hide the file name when pinned
how to implement it in bufferline
also interesting how to implement the allocation of everything except pinned
and I wonder if you can add animations from barbar to bufferline would be great.

### Why?

_No response_