Complete Antergos NeXT custom theme with cross-DE support

- Custom GTK3/GTK4/GTK2 theme (AntergosNeXT) with blue #2EA3F2 accent
- KDE Plasma color scheme matching the theme
- dconf overrides for GNOME/Cinnamon/Budgie/Deepin
- XFCE xfconf defaults for theme/icon/font
- GTK settings.ini for all GTK-based DEs
- /etc/skel defaults for new users

packages/antergos-next-desktop-settings/antergos-next-dconf

@@ -0,0 +1,24 @@
+[org/gnome/desktop/interface]
+gtk-theme='Breeze-Dark'
+icon-theme='breeze-dark'
+cursor-theme='breeze_cursors'
+font-name='Noto Sans, 10'
+color-scheme='prefer-dark'
+
+[org/gnome/desktop/background]
+picture-uri='file:///usr/share/backgrounds/antergos-next/default.jpg'
+picture-uri-dark='file:///usr/share/backgrounds/antergos-next/default.jpg'
+
+[org/gnome/desktop/screensaver]
+picture-uri='file:///usr/share/backgrounds/antergos-next/default.jpg'
+
+[org/cinnamon/desktop/interface]
+gtk-theme='Breeze-Dark'
+icon-theme='breeze-dark'
+cursor-theme='breeze_cursors'
+font-name='Noto Sans, 10'
+
+[com/deepin/dde/appearance]
+gtk-theme='Breeze-Dark'
+icon-theme='breeze-dark'
+cursor-theme='breeze_cursors'