Neotree on MacOS uses wrong/nonsensical icon theme.

[tidux]

I confirm that...

• I have searched the issue tracker, documentation, FAQ, Discourse, and Google, in case this issue has already been reported/resolved.

• I have read "How to Debug Issues", and will use it to provide as much information about this issue as possible.

• The issue can be reproduced on the latest available commit of Doom.

• The issue can be reproduced on a stable release of Emacs, such as 27, 28, or 29. (Unstable versions end in .50, .60, or .9x)

Expected behavior

Doom Emacs's Neotree config should use the 'arrow icon theme as it does on terminals and X11.

Current behavior

Steps to reproduce

1. install Doom
2. enable neotree
3. restart Emacs
4. SPC o p

System Information

https://pastebin.com/raw/0dC9gsR9