fix(antergos-minimal): add DM/DE compatibility warnings to packagechooser

SDDM pulls x11win-server (system repo) which conflicts with
xlibre-xserver (world repo) pulled by Cinnamon/MATE/LXQt.
Added warning descriptions to all DM choices suggesting
LightDM for incompatible combos.

iso-profiles/antergos-minimal/live-overlay/etc/calamares-online/modules/packagechooser_dm.conf

@@ -0,0 +1,31 @@
+---
+mode: required
+
+method: netinstall-select
+
+labels:
+    step: "Display Manager"
+    step[de]: "Display Manager"
+
+default: SDDM
+
+items:
+    - id: SDDM
+      name: sddm
+      description: "QML-based (KDE default). ⚠ May conflict with Cinnamon/MATE/LXQt (Xorg provider incompatibility). Use LightDM instead if installing those."
+      screenshot: ""
+
+    - id: LightDM
+      name: lightdm
+      description: "Cross-desktop (GTK). Compatible with all desktop environments."
+      screenshot: ""
+
+    - id: LXDM
+      name: lxdm
+      description: "Lightweight (LXDE). Compatible with all desktop environments."
+      screenshot: ""
+
+    - id: LY
+      name: ly
+      description: "Minimal TUI. Compatible with all desktop environments."
+      screenshot: ""

iso-profiles/antergos-minimal/live-overlay/etc/calamares/modules/packagechooser_dm.conf

@@ -12,20 +12,20 @@ default: SDDM
 items:
     - id: SDDM
       name: sddm
-      description: "QML-based display manager (KDE default)"
+      description: "QML-based (KDE default). ⚠ May conflict with Cinnamon/MATE/LXQt (Xorg provider incompatibility). Use LightDM instead if installing those."
       screenshot: ""
 
     - id: LightDM
       name: lightdm
-      description: "Cross-desktop display manager (GTK)"
+      description: "Cross-desktop (GTK). Compatible with all desktop environments."
       screenshot: ""
 
     - id: LXDM
       name: lxdm
-      description: "Lightweight display manager (LXDE)"
+      description: "Lightweight (LXDE). Compatible with all desktop environments."
       screenshot: ""
 
     - id: LY
       name: ly
-      description: "Minimal TUI display manager"
+      description: "Minimal TUI. Compatible with all desktop environments."
       screenshot: ""