Return the default font to Terminus and slightly improve fallback handling

[ifreund]

Summary

SUMMARY: Interface "Return the default font to Terminus and slightly improve fallback handling."

Purpose of change

Fixes #34492

Terminus is simply prettier than unifont and many were sad to see it go in #19965. Luckily @Qrox recently added fallback support for fonts and effectively negated the issues leading to the switch to unifont.

In addition to that, we currently don't have a square map and overmap font by default, perhaps because of how ugly unifont looks at 16x16.

Describe the solution

• Make Terminus the default font
• Prevent users from shooting themselves in the foot by always loading unifont as a fallback even if it is not specified
• Make the default (over)map font square

Testing

Loading fonts in various configurations and checking the description of the language option to see if fallback worked.

[Muffindrake]

The gentoo wiki denounces GNU Unifont as 'ugly as sin'. I can't believe that choice was made, it should only be dead last in a fallback list, but I'm not invested because I don't play Tiles.

Besides that, I'd have a recommendation in terms of default fonts. https://github.com/pcaro90/hermit

[esotericist]

The gentoo wiki denounces GNU Unifont as 'ugly as sin'. I can't believe that choice was made, it should only be dead last in a fallback list, but I'm not invested because I don't play Tiles.

Besides that, I'd have a recommendation in terms of default fonts. https://github.com/pcaro90/hermit

find us a better single monospace font that covers all of our language support requirements, and we'll be happy to use it as default.

hermit fails that standard.

[esotericist]

Fixes #34492

probably

[Muffindrake]

Every relevant font renderer has fallback mechanisms for missing fonts, unless I'm wrong on this one. Terminus certainly isn't high up on the list of 'next-gen exciting fonts', so I merely suggested one additional font as an alternative.

[ifreund]

@Muffindrake I believe there's been a bit of a misunderstanding. If you check out #19965 you can see that we only used unifont by default because we lacked a font fallback mechanism, a lack which has just recently been corrected. Terminus may not be "exciting" but it was the default font of tiles builds of CDDA when I first played and fits the role of a readable default quite well.