Doom/Emacs fails to load when a font set with doom-font is not present on system

### I confirm that...

- [X] I have searched the [issue tracker](https://github.com/doomemacs/doomemacs/issues), [documentation](https://docs.doomemacs.org), [FAQ](https://docs.doomemacs.org/-/faq), [Discourse](https://discourse.doomemacs.org), and [Google](https://google.com), in case this issue has already been reported/resolved.

- [X] I have read "[How to Debug Issues](https://doomemacs.org/d/how2debug)", and will use it to provide as much information about this issue as possible.

- [X] The issue can be reproduced on the **latest** available commit of Doom.

- [X] The issue can be reproduced on a stable release of Emacs, such as 27 or 28. *(Doom does not support development builds like 29+ or any version ending in .50 or .9x)*

### Expected behavior

When the font in a config is set to a font that does not exist, I expect that a fallback will be used

### Current behavior

When the font in a config is set to a font that does not exist, Emacs window loads but nothing else does and it appears to be frozen.

### Steps to reproduce

1. Set your config to a font that doesn't exist
2. Open emacs
3. Nothing loads

### System Information

https://pastebin.com/mQ4Qqu05