Re-normalizing a path after a `joinpath` isn't necessary. Calling
`normalize` on each child directory had quite a bit of impact when
traversing a large directory.
A simple test showed:
Before: ~144ms
After: ~80ms
running the following logic against a dir with 4367 child folders and
25826 files:
local files = {}
local start = uv.hrtime()
for name, type in vim.fs.dir(path, { depth = max_depth }) do
table.insert(files, { name, type })
end
local duration = uv.hrtime() - start
Relates to https://github.com/neovim/neovim/issues/23291
8bb67d64e2