fix: replace broken services-artix/postcfg modules with shellprocess

services-artix and postcfg Calamares modules don't exist in upstream
Calamares (they're Garuda/Artix fork patches). Our custom Calamares
builds from pure upstream, so these steps get silently skipped during
installation, leaving NO services enabled in the installed system.

Replace them with shellprocess@enable-services, which uses the
built-in shellprocess module to run a post-install script that:
- Detects the init system (dinit/openrc/runit/s6)
- Enables all system services via boot.d symlinks or equivalent
- Sets up user services (pipewire, wireplumber) for the created user

Affects both online and offline installer settings.

iso-profiles/antergos/live-overlay/etc/calamares-offline/modules/enable-services.conf

@@ -0,0 +1,5 @@
+---
+dontChroot: true
+timeout: 60
+script:
+    - "-/usr/local/bin/enable-services.sh ${USER} ${ROOT}"

iso-profiles/antergos/live-overlay/etc/calamares-offline/settings.conf

@@ -26,14 +26,18 @@ sequence:
         - displaymanager
         - networkcfg
         - hwclock
-        - services-artix
+        - shellprocess@enable-services
         - grubcfg
         - bootloader
-        - postcfg
         - umount
     - show:
         - finished
 
+instances:
+- id:       enable-services
+  module:   shellprocess
+  config:   enable-services.conf
+
 branding: antergos-next
 
 prompt-install: false

iso-profiles/antergos/live-overlay/etc/calamares-online/modules/enable-services.conf

@@ -0,0 +1,5 @@
+---
+dontChroot: true
+timeout: 60
+script:
+    - "-/usr/local/bin/enable-services.sh ${USER} ${ROOT}"

iso-profiles/antergos/live-overlay/etc/calamares-online/settings.conf

@@ -30,10 +30,9 @@ sequence:
         - displaymanager
         - networkcfg
         - hwclock
-        - services-artix
+        - shellprocess@enable-services
         - grubcfg
         - bootloader
-        - postcfg
         - umount
     - show:
         - finished
@@ -42,6 +41,9 @@ instances:
 - id:       dm
   module:   packagechooser
   config:   packagechooser_dm.conf
+- id:       enable-services
+  module:   shellprocess
+  config:   enable-services.conf
 
 branding: antergos-next
 

iso-profiles/antergos/live-overlay/etc/calamares/modules/enable-services.conf

@@ -0,0 +1,5 @@
+---
+dontChroot: true
+timeout: 60
+script:
+    - "-/usr/local/bin/enable-services.sh ${USER} ${ROOT}"