Font Patcher ignores PUA-A region leaving FairfaxHD partially patched
### Requirements

- [X] I have searched the [issues](https://github.com/ryanoasis/nerd-fonts/issues) for my issue and found nothing related or helpful
- [X] I have searched the [FAQ](https://github.com/ryanoasis/nerd-fonts/wiki/FAQ-and-Troubleshooting) for help
- [X] I have checked the [Wiki](https://github.com/ryanoasis/nerd-fonts/wiki) for help

### Experienced Behavior

[Fairfax HD](https://www.kreativekorp.com/software/fonts/fairfaxhd/) comes with an insane amount of custom scripts and conlang extensions living in the Private Use Area, which while cool, stops programs (like Wezterm) from using a Nerd Font fallback, as it already sees characters defined at codepoints where Nerd Font symbols usually would be. To try and fix this I used the font-patcher, but when I run it I get two messages: that my version of `iconv` doesn't support Mac Roman, and that it is ignoring PUAA. I tried looking into the iconv thing, but found nothing. I am unaware if the two messages are related at all, but what I do know is that the PUA-A region contains symbols used by programs like [eza](https://github.com/eza-community/eza) which work on pre-patched fonts such as Hax Nerd Font, but which don't work with FairfaxHD after using the patcher. Instead it continues to display the conlang glyphs that Fairfax comes with.

### Expected Behavior

I expect the patcher to also patch (or at least be able to with a flag) the Private Use Area - A code points, as those are available Nerd Fonts such as Hax Nerd Font.

### Example Symbols or Text

Codepoints in the Basic Multilingual Plane, such as `\ue5ff` have been correctly patched as expected, whereas codepoints in the Supplementary Private Use Area A, such as `\uf15b` remain untouched by the patcher.

### Font Used

Fairfax Hax HD

### Source of Font File

https://www.kreativekorp.com/software/fonts/fairfaxhd/

### Terminal Emulator (and the title of the terminal window)

Wezterm

### Operating System and Version

Void Linux

### Screenshots

_No response_