feat: branding DE/DM selectors, slideshow content redesign, layan wallpaper fix

calamares-branding-antergos-next:
- Replace packagechooser.conf (method: legacy, init selector) with
  packagechooser_de.conf (9 DEs, netinstall-add) and packagechooser_dm.conf
  (5 DMs, netinstall-select)
- Clean netinstall.yaml: remove Budgie, split i3/Sway, drop hidden groups
- Update settings_online.conf with packagechooser@de + @dm instances
- Redesign slideshow: 7 slides, accurate copy (Artix-based, not Arch),
  accent bar, better layout
- Bump pkgrel to 23

antergos-layan-theme:
- Fix plasma-org.kde.plasma.desktop-appletsrc video wallpaper path:
  Retro%20Sun%20WPE.mp4 -> antergos-wallpaper.mp4

packages/calamares-branding-antergos-next/PKGBUILD

@@ -2,7 +2,7 @@
 
 pkgname=calamares-branding-antergos-next
 pkgver=1.0
-pkgrel=22
+pkgrel=23
 pkgdesc="Calamares branding for Antergos NeXT with offline/online installer support"
 arch=('any')
 url="https://github.com/Antergos-NeXT"
@@ -26,9 +26,10 @@ source=("branding.desc"
          "initcpio.conf"
         "antergos-logo.png"
         "antergos-icon.png"
-        "netinstall.yaml"
+         "netinstall.yaml"
          "netinstall.conf"
-         "packagechooser.conf"
+         "packagechooser_de.conf"
+         "packagechooser_dm.conf"
          "welcome.conf"
         "settings_offline.conf"
         "settings_online.conf"
@@ -53,9 +54,11 @@ sha256sums=('SKIP'
             'SKIP'
             'SKIP'
             'SKIP'
-             'SKIP'
-             'SKIP'
-             'SKIP')
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP')
 
 package() {
   # Branding data (shared between offline/online)
@@ -100,7 +103,8 @@ package() {
   cp "initcpio.conf" "${pkgdir}/etc/calamares/modules/"
   cp "netinstall.conf" "${pkgdir}/etc/calamares/modules/"
   cp "netinstall.yaml" "${pkgdir}/etc/calamares/modules/"
-  cp "packagechooser.conf" "${pkgdir}/etc/calamares/modules/"
+  cp "packagechooser_de.conf" "${pkgdir}/etc/calamares/modules/"
+  cp "packagechooser_dm.conf" "${pkgdir}/etc/calamares/modules/"
   cp "welcome.conf" "${pkgdir}/etc/calamares/modules/"
 
   # Offline config directory