fix: enable xlibre-xserver (use-xlibre: true) to resolve X provider conflicts

xlibre-xserver is the modern Artix unified X server that provides
both x11win-server (required by SDDM) and xorg-server (required by
all DEs). Setting use-xlibre: false caused the old split packages
(x11win-server from system repo vs xorg-server from world repo) to
conflict during online installs when users selected SDDM + any DE
that pulls xorg-server/xlibre-xserver.

Switched both full and minimal profiles to use-xlibre: true.

iso-profiles/antergos-minimal/profile.yaml

@@ -6,7 +6,7 @@ live-session:
   user: antergos
   password: antergos
   autologin: true
-  use-xlibre: false
+  use-xlibre: true
   services:
     - acpid
     - bluetoothd

iso-profiles/antergos/profile.yaml

@@ -3,7 +3,7 @@ live-session:
   user: antergos
   password: antergos
   autologin: true
-  use-xlibre: false
+  use-xlibre: true
   services:
     - acpid
     - bluetoothd

iso-profiles/antergos/root-overlay/etc/pacman.conf

@@ -13,6 +13,9 @@ CheckSpace
 ParallelDownloads = 5
 DownloadUser = alpm
 
+# Strip docs/man/info to save space in the ISO
+NoExtract = usr/share/doc/* usr/share/man/* usr/share/info/*
+
 SigLevel    = Required DatabaseOptional
 LocalFileSigLevel = Optional