Initial Das OS 0.1.0: Void Linux live ISO with Xfce

- xbps-src templates: das-theme (adw-gtk3-based GTK themes, generated
  xfwm4 frames, wallpapers, logo), das-settings (Xfce, panel, LightDM
  defaults in /etc/xdg/das), adw-gtk3 and font-jetbrains-mono
- void-mklive profile in live/: packages, runit services, rootfs overlay,
  Ukrainian locale, live user with autologin
- Void builder container, build scripts, QEMU runner and Makefile
- Bilingual README with screenshots

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/container/build-iso.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+# Builds the Das OS live ISO with void-mklive from the profile in live/.
+# Runs inside the builder container, see scripts/builder.sh.
+set -euo pipefail
+
+repo=/work/out/hostdir/binpkgs
+version=$(< /work/VERSION)
+iso=/work/out/iso/dasos-${version}-x86_64.iso
+
+if ! compgen -G "$repo/*-repodata" >/dev/null; then
+  echo "build-iso: the local package repository is missing, run 'make packages' first" >&2
+  exit 1
+fi
+
+# Reads a list file: one item per line, '#' starts a comment
+read_list() {
+  sed -e 's/#.*//' -e '/^[[:space:]]*$/d' "$1" | xargs
+}
+
+work=$(mktemp -d)
+mkdir -p /work/out/iso
+trap 'rm -rf "$work"; chown -R "$HOST_UID:$HOST_GID" /work/out/iso' EXIT
+
+# Root file system overlay: static files from live/include plus generated links
+include=$work/include
+cp -a /work/live/include "$include"
+ln -sf /usr/share/zoneinfo/Europe/Kyiv "$include/etc/localtime"
+# PipeWire as the sound server, wired up the same way as Void's own live images
+mkdir -p "$include"/etc/xdg/autostart "$include"/etc/pipewire/pipewire.conf.d "$include"/etc/alsa/conf.d
+ln -sf /usr/share/applications/pipewire.desktop "$include"/etc/xdg/autostart/
+ln -sf /usr/share/examples/wireplumber/10-wireplumber.conf "$include"/etc/pipewire/pipewire.conf.d/
+ln -sf /usr/share/examples/pipewire/20-pipewire-pulse.conf "$include"/etc/pipewire/pipewire.conf.d/
+ln -sf /usr/share/alsa/alsa.conf.d/50-pipewire.conf "$include"/etc/alsa/conf.d/
+ln -sf /usr/share/alsa/alsa.conf.d/99-pipewire-default.conf "$include"/etc/alsa/conf.d/
+
+# mklive's dracut module creates the live user, hostname and passwords at boot.
+# Rebrand its defaults in this container's copy (the image itself stays untouched).
+adduser=/opt/void-mklive/dracut/vmklive/adduser.sh
+for pattern in 'echo void-live >' 'voidlinux'; do
+  if ! grep -q "$pattern" "$adduser"; then
+    echo "build-iso: '$pattern' not found in $adduser, mklive changed; update this script" >&2
+    exit 1
+  fi
+done
+sed -i -e 's/echo void-live >/echo dasos >/' -e 's/voidlinux/live/g' "$adduser"
+
+rsvg-convert /work/live/branding/splash.svg --output "$work/splash.png"
+rm -f "$iso"
+
+cd /opt/void-mklive
+SPLASH_IMAGE=$work/splash.png ./mklive.sh \
+  -a x86_64 \
+  -r "$repo" \
+  -c /var/cache/xbps \
+  -p "$(read_list /work/live/packages.x86_64)" \
+  -S "$(read_list /work/live/services)" \
+  -I "$include" \
+  -l uk_UA.UTF-8 \
+  -k us \
+  -T "Das OS" \
+  -C "live.user=live quiet loglevel=3" \
+  -o "$iso"