Include Inter typeface

[avojak]

Problem

The Flatpak runtime currently has all the expected icons, stylesheets etc., but does not have the Inter typeface available. Including it would help complete the idea of elementary OS Flatpak apps that retain the same look and feel across different operating systems.

In my particular case I'm not so much worried about application menus (personally I'd leave that up to the system), but I'm displaying some text in a game area where I'd like to be able to count on the look and feel (including font size and weight) of a single font rather than hope that the default sans-serif font on the system will suffice.

Proposal

Include Inter in the Flatpak runtime so that it's available to apps if they'd like to explicitly use it as the sans-serif font du jour.

Prior Art (Optional)

No response