moved fonts.nix to global setings

common/global/fonts.nix

@@ -0,0 +1,10 @@
+{ pkgs, ... }:
+{
+  fonts = {
+    fontconfig.enable = true;
+    enableDefaultPackages = true;
+    packages = with pkgs; [
+      nerdfonts
+    ];
+  };
+}