Add darkman support

Author: razor-x

manifest.js

@@ -27,6 +27,14 @@ const directories = [{
   dst: 'etc/systemd/system/[email protected]'
 }, {
   src: 'etc/systemd/resolved.conf.d'
+}, {
+  src: 'usr/local/share/dark-mode.d',
+  fmode: '0755',
+  pkgs: ['darkman']
+}, {
+  src: 'usr/local/share/light-mode.d',
+  fmode: '0755',
+  pkgs: ['darkman']
 }]
 
 const files = [{

usr/local/share/dark-mode.d/gtk-theme.sh

@@ -0,0 +1,4 @@
+# Note: The names for the Arc theme variations are terrible.
+# "Darker" is actually LESS DARK than "Dark".
+
+gsettings set org.gnome.desktop.interface gtk-theme Arc-Dark

usr/local/share/light-mode.d/gtk-theme.sh

@@ -0,0 +1,4 @@
+# Note: The names for the Arc theme variations are terrible.
+# "Darker" is actually LESS DARK than "Dark".
+
+gsettings set org.gnome.desktop.interface gtk-theme Arc-Darker