Function keys do not work properly with certain keyboards on macOS

[unilock]

Minecraft Version: 1.20.1, 1.20.4, 1.21.1

NeoForge Version: 47.1.106, 20.4.237, 21.1.77

Logs: 1.21.1: https://gist.github.com/unilock/a699a9ebba05e3da37dbb5759e381f16

Steps to Reproduce:

1. Install Minecraft 1.21.1 + NeoForge on macOS
2. Attempt to bind a key to a function key (F1, F2, F3, ...)
3. The key is bound as "Not Bound" instead

Description of issue:
The function keys (F1 thru F12) can't be used with keybinds (they always end up as "Not Bound"), and the debug keybinds (F3+x) just bring up the debug overlay instead of... debugging.

I assume this is because "F3" on macOS is technically "fn+F3" ("fn" being a separate key). I guess NeoForge detects the "fn" instead of (or before) the "F3", and treats it as an unknown key - thus "Not Bound".

Interestingly, editing options.txt to bind a function key results in that keybind working fine in-game.

All of this works without issue on both vanilla and Fabric.