[feature request] Add breadcrumb to the sidebar

[dmtrKovalenko]

Description

I use outline nvim as my permanent sidebar which looks like this

and the only feature that I somewhat miss in the current layout is the active directory name, I use the but it is somewhat annoying to read when the directory is deeply nested. And I also don't like to spend a line from the buffer for this.

So my idea is to have something similar to what lspsaga has https://nvimdev.github.io/lspsaga/breadcrumbs/ or https://neovimcraft.com/plugin/Bekaboo/dropbar.nvim/ to display the folder and filename of the active window (because it anyway kinds of repeats the functionality)

I can make a PR for that and make it optional for sure