Problem:
dir.lua leaves previously-navigated directory buffers around.
This is fine by default, but users need a simple way to opt out.
Solution:
1. Respect `set hidden` (via `'bufhidden'`) as one way to make
previously-navigated dir buffers from showing up.
2. Document a one-liner to hide these buffers
Problem:
`:edit <dir>` and `nvim <dir>` currently rely on netrw to show local directory
contents.
Solution:
- Provide `filetype=directory`.
- Introduce dir.lua, a small plugin that provides directory listing, opening
items, parent navigation, and refresh.
- `netrw` remains available for `:Explore`, remote paths, archives, and file
operations. To continue
Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
