fix(resolution): Alternate to xrandr when xdpyinfo unavailable

[OPhamster]

• xrandr seems to come by default on manjaro and seems to ship with most other distros.

[narinishi]

Could you add an additional fallback to utilize fbset -i?
Note, the resolution printed will only correspond to that of X if the user is running X with the fbdev video backend, which is uncommon. It will however typically correspond to the TTY resolution, which could be useful if the user does not have X.