treewide: move hidpi settings to another module, make conditional on nixos version

common/hidpi.nix

@@ -0,0 +1,12 @@
+{ lib, pkgs, ... }:
+let
+  # This option is removed from NixOS 23.05 and up
+  nixosVersion = lib.versions.majorMinor lib.version;
+  config = if lib.versionOlder nixosVersion "23.05" then {
+    hardware.video.hidpi.enable = lib.mkDefault true;
+  } else {
+    # Just set the console font, don't mess with the font settings
+    console.font = lib.mkDefault "${pkgs.terminus_font}/share/consolefonts/ter-v32n.psf.gz";
+    console.earlySetup = lib.mkDefault true;
+  };
+in config