Customizable font for usernames

As a user, I like customizing how I appear to others. Fluxer has somewhat limited support for these features compared to other apps.

Similar to other chat apps, I'd like to be able to choose the font my username appears in when I chat or join voice chats. Applying an effect (gradient, glow, etc.) would be fun too. I think I've seen some controversy around these features, so I would highly recommend also adding a switch to "disable custom username effects" so those who dislike them (or whose accessibility this affects) can turn off the feature.

To avoid any complication from loading fonts from external sources, there could be a preset selection of fonts. Maybe self-hosted instances could add fonts to their selection as well.