modularize colorscheming and more

configs/fonts.nix

@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+{
+  niveum.fonts = {
+    ui = {
+      name = "Sans";
+      size = 9;
+    };
+    terminal = {
+      name = "Monospace";
+      size = 9;
+    };
+  };
+
+  fonts = {
+    enableDefaultFonts = true;
+    fonts = with pkgs; [ corefonts eb-garamond fira libertine lmodern noto-fonts roboto ubuntu_font_family ];
+  };
+}