fix(core-packages): make PipeWire the jack/pulse provider to avoid DE conflict

core-packages installs ffmpeg, which depends on the virtual `jack`. With only
`pipewire` (not pipewire-jack) requested, pacman --noconfirm picks the default
provider `jack2`. The DE modules then install `pipewire-jack`, which conflicts
with the already-installed jack2 — pacman can't auto-resolve it and aborts the
whole DE module ("pipewire-jack and jack2 are in conflict").

Explicitly list pipewire-jack/pipewire-pulse/pipewire-alsa in core-packages so
PipeWire is the chosen provider from the start; jack2 is never pulled and the DE
package install no longer conflicts.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01R5kHioUMK3mtf2eiLEozCM

setup/modules/core-packages.sh

@@ -119,6 +119,13 @@ CORE_PACKAGES=(
     parted                # Disk partitioning tool — used by arch-autoinstall.sh
     pciutils              # lspci — list PCI devices (needed for GPU detection)
     pipewire              # Modern audio/video server (replaces PulseAudio + JACK)
+    # Install the PipeWire JACK/Pulse/ALSA shims explicitly so PipeWire is the
+    # chosen provider for the virtual `jack`/`pulse` packages. Otherwise a
+    # jack-dependent package here (e.g. ffmpeg) makes pacman pick jack2 by default,
+    # which later conflicts with the DE modules' pipewire-jack and aborts them.
+    pipewire-jack         # JACK API provided by PipeWire (conflicts with jack2)
+    pipewire-pulse        # PulseAudio server replacement via PipeWire
+    pipewire-alsa         # ALSA → PipeWire routing (config, no conflicting daemon)
 
     # ── Programming languages ────────────────────────────────────────────────
     python                # Python 3 interpreter