Font options for the font-codepoint-map setting

[Aeron]

The problem I have is quite simple: I want to remap a few font sprites with a font of my choosing so it better fits my prompt format. And it’s fairly easy by using the aforementioned font-codepoint-map setting. But it only allows specifying a font name, nothing more. Also, it doesn’t seem that remapping considers the font-style setting or anything like that. So, if I want to remap a code-point to a certain font style like Thin, I’m out of luck.

The probable solution here is to add font options for mapping values which is (kind of) relevant to #3296 on the matter of how.

Here is the example (Terminal.app on the left; Ghostty on the right):

The font is Input Mono Condensed. The arrow is not the problem—it’s just a different font fallback. The U+250C (┌) and U+2514 (└) characters are the subject. Overlapping should be fixable. Ghostty has a slightly bigger font—it’s intentional.

Maybe, another solution is to introduce a setting to simply disable font sprites, so everything would be rendered as configured fonts. Not everyone runs Powerlines and the Doom Fire anyways.

Am I missing anything? I did my best to search through existing issues and discussions. Is there a simpler way I overlooked?

P.S. @mitchellh, thank you for all the effort and an amazing New Year’s present ❤️