more modules and move stuff to modules

modules/fonts/default.nix

@@ -0,0 +1,18 @@
+{ pkgs, ... }: {
+  fonts = {
+    packages = with pkgs; [
+      alegreya
+      alegreya-sans
+      (nerdfonts.override { fonts = [ "FiraCode" ]; })
+      roboto
+      ubuntu_font_family
+    ];
+    fontconfig = {
+      defaultFonts = {
+        serif = [ "Alegreya" ];
+        sansSerif = [ "Alegreya Sans" ];
+        monospace = [ "Fira Code Nerd Font" ];
+      };
+    };
+  };
+}