iso: fix packages.x86_64 (no inline comments; gstreamer-vaapi -> gst-plugin-va)

Inline comments after a package name broke kitty/flatpak (became invalid
names with trailing whitespace). gstreamer-vaapi was removed from Arch.
calamares is AUR-only -> commented pending a [tanin] rebuild decision.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

iso/build-profile/airootfs/etc/calamares/modules/shellprocess-snapper.conf

@@ -0,0 +1,11 @@
+---
+dontChroot: false
+timeout: 120
+# Best-effort snapper setup on the Btrfs target. The @snapshots subvolume is
+# already mounted at /.snapshots (see mount.conf); snapper's own create-config
+# can conflict with a pre-existing /.snapshots, so this is tolerant.
+# snap-pac then auto-snapshots before/after each pacman transaction.
+script:
+- command: "snapper --no-dbus -c root create-config / || true"
+  timeout: 60
+- "snapper --no-dbus -c root set-config NUMBER_LIMIT=10 NUMBER_LIMIT_IMPORTANT=5 TIMELINE_CREATE=no || true"