fix: add fallback values for font-family

[ayushnix]

If a user is using web browsers like Firefox and enforcing their own and/or blocking remote fonts, the font-family values which enforce a single font like Noto Sans Mono don't work as expected. Adding fallback values of monospace and sans-serif fixes this issue.

[q66]

this just broke the remote fonts entirely, i had to fix that separately

[ayushnix]

Ah, apologies for missing https://github.com/chimera-linux/chimera-linux.github.io/commit/fbf6339369288d49c1a023438f3f9cbc10719b9e 😅