add pipewire.desktop autostart and configure SDDM Wayland compositor

Place pipewire.desktop in root-overlay /etc/skel/.config/autostart/
so PipeWire starts via XDG autostart on login via the patched
artix-pipewire-launcher (now supports dinit in our pipewire fork).

Configure SDDM [Wayland] section with kwin_wayland compositor
command for a Wayland-native greeter display.

Includes:
- buildiso: antergos theme symlinked as artix for prepare_grub
- profile.yaml: dinit-user-spawn -> userspawn-dinit, added
  dbus-dinit-user, pipewire-pulse-dinit, userspawn-dinit to livefs,
  antergos-lsb-release
- services-artix.conf: dinit-user-spawn -> userspawn
- basestrap.conf: xlibre-xserver for online install
- pacman.conf: IgnorePkg xorg-server to avoid conflict with xlibre
- sddm.conf: Wayland compositor command
- common.yaml: cleanup (dedup lsb-release, vi->ex-vi-compat,
  remove artix-grub-theme, jack2, noto-fonts-emoji)
- iso-x86_64.conf: IgnorePkg xorg-server for ISO build

iso-profiles/common/common.yaml

@@ -20,14 +20,12 @@ packages-base:
   - exfat-utils
   - f2fs-tools
   - grub
-  - artix-grub-theme
   - inetutils
   - iptables
   - jfsutils
   - linux
   - linux-firmware
   - linux-headers
-  - lsb-release
   - logrotate
   - lsb-release
   - man-db
@@ -46,12 +44,10 @@ packages-base:
   - sysfsutils
   - texinfo
   - usbutils
-  - ex-vi-compat
+  - vi
   - which
   - xfsprogs
   - zsh
-  - jack2
-  - noto-fonts-emoji
 packages-apps:
   - powertop
   - inxi
@@ -71,18 +67,18 @@ packages-xorg:
   - xf86-video-voodoo
 packages-xlibre:
   - xlibre-xserver
-  - xlibre-xf86-input-vmmouse
-  - xlibre-xf86-input-wacom
-  - xlibre-xf86-video-amdgpu
-  - xlibre-xf86-video-ati
-  - xlibre-xf86-video-dummy
-  - xlibre-xf86-video-fbdev
-  - xlibre-xf86-video-intel
-  - xlibre-xf86-video-nouveau
-  - xlibre-xf86-video-sisusb
-  - xlibre-xf86-video-qxl
-  - xlibre-xf86-video-vesa
-  - xlibre-xf86-video-voodoo
+  - xlibre-input-vmmouse
+  - xlibre-input-wacom
+  - xlibre-video-amdgpu
+  - xlibre-video-ati
+  - xlibre-video-dummy
+  - xlibre-video-fbdev
+  - xlibre-video-intel
+  - xlibre-video-nouveau
+  - xlibre-video-sisusb
+  - xlibre-video-qxl
+  - xlibre-video-vesa
+  - xlibre-video-voodoo
 packages-misc:
   - xorg-xhost
   - xorg-xinit
@@ -97,17 +93,6 @@ packages-misc:
   - ttf-roboto
   - ttf-roboto-mono
   - ttf-droid
-  # - vkd3d
-  # - vulkan-intel
-  # - vulkan-radeon
-  # - vulkan-swrast
-  # - mesa-vdpau
-  # - libva-mesa-driver
-  # - libva-intel-driver
-  # - gst-plugins-good
-  # - gst-plugins-bad
-  # - gst-plugins-ugly
-  # - gst-libav
 packages-init:
   dinit:
     - blocaled